77916313 has 2 divisors, whose sum is σ = 77916314. Its totient is φ = 77916312.

The previous prime is 77916257. The next prime is 77916329. The reversal of 77916313 is 31361977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64432729 + 13483584 = 8027^2 + 3672^2 .

It is a cyclic number.

It is not a de Polignac number, because 77916313 - 2¹³ = 77908121 is a prime.

It is not a weakly prime, because it can be changed into another prime (77916383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38958156 + 38958157.

It is an arithmetic number, because the mean of its divisors is an integer number (38958157).

Almost surely, 2^77916313 is an apocalyptic number.

It is an amenable number.

77916313 is a deficient number, since it is larger than the sum of its proper divisors (1).

77916313 is an equidigital number, since it uses as much as digits as its factorization.

77916313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 37.

The square root of 77916313 is about 8827.0217514176. The cubic root of 77916313 is about 427.1130075108.

The spelling of 77916313 in words is "seventy-seven million, nine hundred sixteen thousand, three hundred thirteen".