77064131 has 2 divisors, whose sum is σ = 77064132. Its totient is φ = 77064130.

The previous prime is 77064103. The next prime is 77064139. The reversal of 77064131 is 13146077.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77064131 is a prime.

It is a super-2 number, since 2×77064131² = 11877760573570322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 77064094 and 77064103.

It is not a weakly prime, because it can be changed into another prime (77064139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38532065 + 38532066.

It is an arithmetic number, because the mean of its divisors is an integer number (38532066).

Almost surely, 2^77064131 is an apocalyptic number.

77064131 is a deficient number, since it is larger than the sum of its proper divisors (1).

77064131 is an equidigital number, since it uses as much as digits as its factorization.

77064131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 77064131 is about 8778.6178297042. The cubic root of 77064131 is about 425.5501636290.

The spelling of 77064131 in words is "seventy-seven million, sixty-four thousand, one hundred thirty-one".