869065931 has 2 divisors, whose sum is σ = 869065932. Its totient is φ = 869065930.

The previous prime is 869065927. The next prime is 869066021. The reversal of 869065931 is 139560968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869065931 - 2² = 869065927 is a prime.

It is a super-2 number, since 2×869065931² = 1510551184849793522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869065031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434532965 + 434532966.

It is an arithmetic number, because the mean of its divisors is an integer number (434532966).

Almost surely, 2^869065931 is an apocalyptic number.

869065931 is a deficient number, since it is larger than the sum of its proper divisors (1).

869065931 is an equidigital number, since it uses as much as digits as its factorization.

869065931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 869065931 is about 29479.9242027519. The cubic root of 869065931 is about 954.2985011291.

The spelling of 869065931 in words is "eight hundred sixty-nine million, sixty-five thousand, nine hundred thirty-one".