857325913 has 4 divisors (see below), whose sum is σ = 857477860. Its totient is φ = 857173968.

The previous prime is 857325901. The next prime is 857325947. The reversal of 857325913 is 319523758.

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 75116889 + 782209024 = 8667^2 + 27968^2 .

It is a cyclic number.

It is not a de Polignac number, because 857325913 - 2⁵ = 857325881 is a prime.

It is a super-2 number, since 2×857325913² = 1470015442202567138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857325913.

It is not an unprimeable number, because it can be changed into a prime (857322913) 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, 67170 + ... + 78907.

It is an arithmetic number, because the mean of its divisors is an integer number (214369465).

Almost surely, 2^857325913 is an apocalyptic number.

It is an amenable number.

857325913 is a deficient number, since it is larger than the sum of its proper divisors (151947).

857325913 is a wasteful number, since it uses less digits than its factorization.

857325913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151946.

The product of its digits is 226800, while the sum is 43.

The square root of 857325913 is about 29280.1282954840. The cubic root of 857325913 is about 949.9818696448.

The spelling of 857325913 in words is "eight hundred fifty-seven million, three hundred twenty-five thousand, nine hundred thirteen".