77616793 has 2 divisors, whose sum is σ = 77616794. Its totient is φ = 77616792.

The previous prime is 77616779. The next prime is 77616797. The reversal of 77616793 is 39761677.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65415744 + 12201049 = 8088^2 + 3493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77616793 is a prime.

It is not a weakly prime, because it can be changed into another prime (77616797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38808396 + 38808397.

It is an arithmetic number, because the mean of its divisors is an integer number (38808397).

Almost surely, 2^77616793 is an apocalyptic number.

It is an amenable number.

77616793 is a deficient number, since it is larger than the sum of its proper divisors (1).

77616793 is an equidigital number, since it uses as much as digits as its factorization.

77616793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 333396, while the sum is 46.

The square root of 77616793 is about 8810.0393302187. The cubic root of 77616793 is about 426.5650128786.

The spelling of 77616793 in words is "seventy-seven million, six hundred sixteen thousand, seven hundred ninety-three".