857670913 has 4 divisors (see below), whose sum is σ = 935641008. Its totient is φ = 779700820.

The previous prime is 857670907. The next prime is 857670917. The reversal of 857670913 is 319076758.

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.

It is a cyclic number.

It is not a de Polignac number, because 857670913 - 2⁵ = 857670881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857670917) 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, 38985031 + ... + 38985052.

It is an arithmetic number, because the mean of its divisors is an integer number (233910252).

Almost surely, 2^857670913 is an apocalyptic number.

It is an amenable number.

857670913 is a deficient number, since it is larger than the sum of its proper divisors (77970095).

857670913 is a wasteful number, since it uses less digits than its factorization.

857670913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77970094.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 857670913 is about 29286.0190705394. The cubic root of 857670913 is about 950.1092812421.

The spelling of 857670913 in words is "eight hundred fifty-seven million, six hundred seventy thousand, nine hundred thirteen".