77600749 has 2 divisors, whose sum is σ = 77600750. Its totient is φ = 77600748.

The previous prime is 77600737. The next prime is 77600819. The reversal of 77600749 is 94700677.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 37822500 = 6307^2 + 6150^2 .

It is an emirp because it is prime and its reverse (94700677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77600749 - 2⁵ = 77600717 is a prime.

It is a super-2 number, since 2×77600749² = 12043752490722002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77600449) 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, 38800374 + 38800375.

It is an arithmetic number, because the mean of its divisors is an integer number (38800375).

Almost surely, 2^77600749 is an apocalyptic number.

It is an amenable number.

77600749 is a deficient number, since it is larger than the sum of its proper divisors (1).

77600749 is an equidigital number, since it uses as much as digits as its factorization.

77600749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 77600749 is about 8809.1287310380. The cubic root of 77600749 is about 426.5356194084.

The spelling of 77600749 in words is "seventy-seven million, six hundred thousand, seven hundred forty-nine".