77086769 has 2 divisors, whose sum is σ = 77086770. Its totient is φ = 77086768.

The previous prime is 77086741. The next prime is 77086813. The reversal of 77086769 is 96768077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 8196769 = 8300^2 + 2863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77086769 is a prime.

It is a super-2 number, since 2×77086769² = 11884739909718722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77086729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38543384 + 38543385.

It is an arithmetic number, because the mean of its divisors is an integer number (38543385).

Almost surely, 2^77086769 is an apocalyptic number.

It is an amenable number.

77086769 is a deficient number, since it is larger than the sum of its proper divisors (1).

77086769 is an equidigital number, since it uses as much as digits as its factorization.

77086769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 77086769 is about 8779.9071179597. The cubic root of 77086769 is about 425.5918287605.

The spelling of 77086769 in words is "seventy-seven million, eighty-six thousand, seven hundred sixty-nine".