870811847947 has 2 divisors, whose sum is σ = 870811847948. Its totient is φ = 870811847946.

The previous prime is 870811847909. The next prime is 870811847959. The reversal of 870811847947 is 749748118078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870811847947 - 2¹⁵ = 870811815179 is a prime.

It is a super-2 number, since 2×870811847947² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (870811247947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435405923973 + 435405923974.

It is an arithmetic number, because the mean of its divisors is an integer number (435405923974).

Almost surely, 2^870811847947 is an apocalyptic number.

870811847947 is a deficient number, since it is larger than the sum of its proper divisors (1).

870811847947 is an equidigital number, since it uses as much as digits as its factorization.

870811847947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25288704, while the sum is 64.

The spelling of 870811847947 in words is "eight hundred seventy billion, eight hundred eleven million, eight hundred forty-seven thousand, nine hundred forty-seven".