856079051 has 2 divisors, whose sum is σ = 856079052. Its totient is φ = 856079050.

The previous prime is 856079023. The next prime is 856079069. The reversal of 856079051 is 150970658.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856079051 is a prime.

It is a super-2 number, since 2×856079051² = 1465742683122121202, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_43877624 and since 856079051 and 43877624 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (856079071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428039525 + 428039526.

It is an arithmetic number, because the mean of its divisors is an integer number (428039526).

Almost surely, 2^856079051 is an apocalyptic number.

856079051 is a deficient number, since it is larger than the sum of its proper divisors (1).

856079051 is an equidigital number, since it uses as much as digits as its factorization.

856079051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 856079051 is about 29258.8285992450. The cubic root of 856079051 is about 949.5211071082.

The spelling of 856079051 in words is "eight hundred fifty-six million, seventy-nine thousand, fifty-one".