Search a number
-
+
981484561 = 1401170051
BaseRepresentation
bin111010100000000…
…100010000010001
32112101211120201001
4322200010100101
54002230001221
6241220342001
733215324011
oct7240042021
92471746631
10981484561
11464027972
12234844901
131284566c5
14944cbc41
155b275391
hex3a804411

981484561 has 4 divisors (see below), whose sum is σ = 981568624. Its totient is φ = 981400500.

The previous prime is 981484519. The next prime is 981484573. The reversal of 981484561 is 165484189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165484189 = 1312729553.

It is a 3-Lehmer number, since φ(981484561) divides (981484561-1)3.

It is a cyclic number.

It is not a de Polignac number, because 981484561 - 27 = 981484433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981484261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21015 + ... + 49036.

It is an arithmetic number, because the mean of its divisors is an integer number (245392156).

It is a Poulet number, since it divides 2981484560-1.

Almost surely, 2981484561 is an apocalyptic number.

It is an amenable number.

981484561 is a deficient number, since it is larger than the sum of its proper divisors (84063).

981484561 is a wasteful number, since it uses less digits than its factorization.

981484561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84062.

The product of its digits is 276480, while the sum is 46.

The square root of 981484561 is about 31328.6539927907. The cubic root of 981484561 is about 993.7896990008.

The spelling of 981484561 in words is "nine hundred eighty-one million, four hundred eighty-four thousand, five hundred sixty-one".

Divisors: 1 14011 70051 981484561