981057361 has 4 divisors (see below), whose sum is σ = 987306292. Its totient is φ = 974808432.

The previous prime is 981057359. The next prime is 981057377. The reversal of 981057361 is 163750189.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160807761 + 820249600 = 12681^2 + 28640^2 .

It is a cyclic number.

It is not a de Polignac number, because 981057361 - 2¹ = 981057359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981037361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3124230 + ... + 3124543.

It is an arithmetic number, because the mean of its divisors is an integer number (246826573).

Almost surely, 2^981057361 is an apocalyptic number.

It is an amenable number.

981057361 is a deficient number, since it is larger than the sum of its proper divisors (6248931).

981057361 is a wasteful number, since it uses less digits than its factorization.

981057361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248930.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 981057361 is about 31321.8352112388. The cubic root of 981057361 is about 993.6454927690.

The spelling of 981057361 in words is "nine hundred eighty-one million, fifty-seven thousand, three hundred sixty-one".