856648007 has 2 divisors, whose sum is σ = 856648008. Its totient is φ = 856648006.

The previous prime is 856647977. The next prime is 856648019. The reversal of 856648007 is 700846658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856648007 - 2²⁴ = 839870791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856678007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428324003 + 428324004.

It is an arithmetic number, because the mean of its divisors is an integer number (428324004).

Almost surely, 2^856648007 is an apocalyptic number.

856648007 is a deficient number, since it is larger than the sum of its proper divisors (1).

856648007 is an equidigital number, since it uses as much as digits as its factorization.

856648007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 856648007 is about 29268.5497932508. The cubic root of 856648007 is about 949.7314132682.

The spelling of 856648007 in words is "eight hundred fifty-six million, six hundred forty-eight thousand, seven".