856970311 has 2 divisors, whose sum is σ = 856970312. Its totient is φ = 856970310.

The previous prime is 856970299. The next prime is 856970327. The reversal of 856970311 is 113079658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856970311 - 2¹¹ = 856968263 is a prime.

It is a super-2 number, since 2×856970311² = 1468796227870873442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856970341) 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 as a sum of consecutive naturals, namely, 428485155 + 428485156.

It is an arithmetic number, because the mean of its divisors is an integer number (428485156).

Almost surely, 2^856970311 is an apocalyptic number.

856970311 is a deficient number, since it is larger than the sum of its proper divisors (1).

856970311 is an equidigital number, since it uses as much as digits as its factorization.

856970311 is an odious number, because the sum of its binary digits is odd.

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

The square root of 856970311 is about 29274.0552537567. The cubic root of 856970311 is about 949.8505068554.

The spelling of 856970311 in words is "eight hundred fifty-six million, nine hundred seventy thousand, three hundred eleven".