869974504965919 has 2 divisors, whose sum is σ = 869974504965920. Its totient is φ = 869974504965918.

The previous prime is 869974504965913. The next prime is 869974504965961. The reversal of 869974504965919 is 919569405479968.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869974504965919 - 2¹⁹ = 869974504441631 is a prime.

It is a super-2 number, since 2×869974504965919² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869974504965913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434987252482959 + 434987252482960.

It is an arithmetic number, because the mean of its divisors is an integer number (434987252482960).

Almost surely, 2^{869974504965919} is an apocalyptic number.

869974504965919 is a deficient number, since it is larger than the sum of its proper divisors (1).

869974504965919 is an equidigital number, since it uses as much as digits as its factorization.

869974504965919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47617113600, while the sum is 91.

The spelling of 869974504965919 in words is "eight hundred sixty-nine trillion, nine hundred seventy-four billion, five hundred four million, nine hundred sixty-five thousand, nine hundred nineteen".