76809631 has 2 divisors, whose sum is σ = 76809632. Its totient is φ = 76809630.

The previous prime is 76809619. The next prime is 76809641. The reversal of 76809631 is 13690867.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76809631 - 2¹¹ = 76807583 is a prime.

It is a super-2 number, since 2×76809631² = 11799438828712322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4493992 and since 76809631 and 4493992 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76809641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38404815 + 38404816.

It is an arithmetic number, because the mean of its divisors is an integer number (38404816).

Almost surely, 2^76809631 is an apocalyptic number.

76809631 is a deficient number, since it is larger than the sum of its proper divisors (1).

76809631 is an equidigital number, since it uses as much as digits as its factorization.

76809631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 76809631 is about 8764.1103941016. The cubic root of 76809631 is about 425.0811950982.

The spelling of 76809631 in words is "seventy-six million, eight hundred nine thousand, six hundred thirty-one".