77716319 has 2 divisors, whose sum is σ = 77716320. Its totient is φ = 77716318.

The previous prime is 77716291. The next prime is 77716337. The reversal of 77716319 is 91361777.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77716319 is a prime.

It is a super-2 number, since 2×77716319² = 12079652477819522, 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 (77716339) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38858159 + 38858160.

It is an arithmetic number, because the mean of its divisors is an integer number (38858160).

Almost surely, 2^77716319 is an apocalyptic number.

77716319 is a deficient number, since it is larger than the sum of its proper divisors (1).

77716319 is an equidigital number, since it uses as much as digits as its factorization.

77716319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 41.

The square root of 77716319 is about 8815.6859631001. The cubic root of 77716319 is about 426.7472594206.

The spelling of 77716319 in words is "seventy-seven million, seven hundred sixteen thousand, three hundred nineteen".