869974479991 has 2 divisors, whose sum is σ = 869974479992. Its totient is φ = 869974479990.

The previous prime is 869974479943. The next prime is 869974480007. The reversal of 869974479991 is 199974479968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869974479991 - 2³¹ = 867826996343 is a prime.

It is a super-2 number, since 2×869974479991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869974479911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434987239995 + 434987239996.

It is an arithmetic number, because the mean of its divisors is an integer number (434987239996).

Almost surely, 2^869974479991 is an apocalyptic number.

869974479991 is a deficient number, since it is larger than the sum of its proper divisors (1).

869974479991 is an equidigital number, since it uses as much as digits as its factorization.

869974479991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222131968, while the sum is 82.

The spelling of 869974479991 in words is "eight hundred sixty-nine billion, nine hundred seventy-four million, four hundred seventy-nine thousand, nine hundred ninety-one".