856823707 has 2 divisors, whose sum is σ = 856823708. Its totient is φ = 856823706.

The previous prime is 856823687. The next prime is 856823713. The reversal of 856823707 is 707328658.

856823707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856823707 is a prime.

It is not a weakly prime, because it can be changed into another prime (856823777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428411853 + 428411854.

It is an arithmetic number, because the mean of its divisors is an integer number (428411854).

Almost surely, 2^856823707 is an apocalyptic number.

856823707 is a deficient number, since it is larger than the sum of its proper divisors (1).

856823707 is an equidigital number, since it uses as much as digits as its factorization.

856823707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 856823707 is about 29271.5511546621. The cubic root of 856823707 is about 949.7963393526.

The spelling of 856823707 in words is "eight hundred fifty-six million, eight hundred twenty-three thousand, seven hundred seven".