856829701979 has 2 divisors, whose sum is σ = 856829701980. Its totient is φ = 856829701978.

The previous prime is 856829701967. The next prime is 856829701991. The reversal of 856829701979 is 979107928658.

It is a balanced prime because it is at equal distance from previous prime (856829701967) and next prime (856829701991).

It is a cyclic number.

It is not a de Polignac number, because 856829701979 - 2⁴ = 856829701963 is a prime.

It is not a weakly prime, because it can be changed into another prime (856829751979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428414850989 + 428414850990.

It is an arithmetic number, because the mean of its divisors is an integer number (428414850990).

Almost surely, 2^856829701979 is an apocalyptic number.

856829701979 is a deficient number, since it is larger than the sum of its proper divisors (1).

856829701979 is an equidigital number, since it uses as much as digits as its factorization.

856829701979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137168640, while the sum is 71.

The spelling of 856829701979 in words is "eight hundred fifty-six billion, eight hundred twenty-nine million, seven hundred one thousand, nine hundred seventy-nine".