857038953 has 4 divisors (see below), whose sum is σ = 1142718608. Its totient is φ = 571359300.

The previous prime is 857038913. The next prime is 857038967. The reversal of 857038953 is 359830758.

It is a happy number.

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 not a de Polignac number, because 857038953 - 2¹⁷ = 856907881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857038913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142839823 + ... + 142839828.

It is an arithmetic number, because the mean of its divisors is an integer number (285679652).

Almost surely, 2^857038953 is an apocalyptic number.

It is an amenable number.

857038953 is a deficient number, since it is larger than the sum of its proper divisors (285679655).

857038953 is a wasteful number, since it uses less digits than its factorization.

857038953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285679654.

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 857038953 is about 29275.2276336154. The cubic root of 857038953 is about 949.8758666984.

The spelling of 857038953 in words is "eight hundred fifty-seven million, thirty-eight thousand, nine hundred fifty-three".