Search a number
-
+
661953 = 3233947
BaseRepresentation
bin10100001100111000001
31020122000210
42201213001
5132140303
622104333
75424615
oct2414701
91218023
10661953
11412376
1227b0a9
131a23b6
14133345
15d1203
hexa19c1

661953 has 8 divisors (see below), whose sum is σ = 887328. Its totient is φ = 438944.

The previous prime is 661951. The next prime is 661961. The reversal of 661953 is 359166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661953 - 21 = 661951 is a prime.

661953 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 661953.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661953.

It is not an unprimeable number, because it can be changed into a prime (661951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (110916).

2661953 is an apocalyptic number.

It is an amenable number.

661953 is a deficient number, since it is larger than the sum of its proper divisors (225375).

661953 is a wasteful number, since it uses less digits than its factorization.

661953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183.

The product of its digits is 4860, while the sum is 30.

The square root of 661953 is about 813.6049409879. The cubic root of 661953 is about 87.1516709581.

The spelling of 661953 in words is "six hundred sixty-one thousand, nine hundred fifty-three".

Divisors: 1 3 233 699 947 2841 220651 661953