77345677 has 2 divisors, whose sum is σ = 77345678. Its totient is φ = 77345676.

The previous prime is 77345659. The next prime is 77345683. The reversal of 77345677 is 77654377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 30846916 = 6819^2 + 5554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77345677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77345627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38672838 + 38672839.

It is an arithmetic number, because the mean of its divisors is an integer number (38672839).

Almost surely, 2^77345677 is an apocalyptic number.

It is an amenable number.

77345677 is a deficient number, since it is larger than the sum of its proper divisors (1).

77345677 is an equidigital number, since it uses as much as digits as its factorization.

77345677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360, while the sum is 46.

The square root of 77345677 is about 8794.6391057280. The cubic root of 77345677 is about 426.0677686129.

The spelling of 77345677 in words is "seventy-seven million, three hundred forty-five thousand, six hundred seventy-seven".