857347513 has 4 divisors (see below), whose sum is σ = 935288208. Its totient is φ = 779406820.

The previous prime is 857347493. The next prime is 857347531. The reversal of 857347513 is 315743758.

857347513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 857347513 - 2⁵ = 857347481 is a prime.

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 857347513.

It is not an unprimeable number, because it can be changed into a prime (857347573) 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, 38970331 + ... + 38970352.

It is an arithmetic number, because the mean of its divisors is an integer number (233822052).

Almost surely, 2^857347513 is an apocalyptic number.

It is an amenable number.

857347513 is a deficient number, since it is larger than the sum of its proper divisors (77940695).

857347513 is a wasteful number, since it uses less digits than its factorization.

857347513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77940694.

The product of its digits is 352800, while the sum is 43.

The square root of 857347513 is about 29280.4971440035. The cubic root of 857347513 is about 949.9898477216.

The spelling of 857347513 in words is "eight hundred fifty-seven million, three hundred forty-seven thousand, five hundred thirteen".