77645683 has 2 divisors, whose sum is σ = 77645684. Its totient is φ = 77645682.

The previous prime is 77645651. The next prime is 77645693. The reversal of 77645683 is 38654677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77645683 - 2⁵ = 77645651 is a prime.

It is not a weakly prime, because it can be changed into another prime (77645693) 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, 38822841 + 38822842.

It is an arithmetic number, because the mean of its divisors is an integer number (38822842).

Almost surely, 2^77645683 is an apocalyptic number.

77645683 is a deficient number, since it is larger than the sum of its proper divisors (1).

77645683 is an equidigital number, since it uses as much as digits as its factorization.

77645683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The square root of 77645683 is about 8811.6787844315. The cubic root of 77645683 is about 426.6179306991.

The spelling of 77645683 in words is "seventy-seven million, six hundred forty-five thousand, six hundred eighty-three".