77313317 has 2 divisors, whose sum is σ = 77313318. Its totient is φ = 77313316.

The previous prime is 77313311. The next prime is 77313323. The reversal of 77313317 is 71331377.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (77313311) and next prime (77313323).

It can be written as a sum of positive squares in only one way, i.e., 62188996 + 15124321 = 7886^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 77313317 - 2⁶ = 77313253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77313311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38656658 + 38656659.

It is an arithmetic number, because the mean of its divisors is an integer number (38656659).

Almost surely, 2^77313317 is an apocalyptic number.

It is an amenable number.

77313317 is a deficient number, since it is larger than the sum of its proper divisors (1).

77313317 is an equidigital number, since it uses as much as digits as its factorization.

77313317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9261, while the sum is 32.

The square root of 77313317 is about 8792.7991561277. The cubic root of 77313317 is about 426.0083407009.

The spelling of 77313317 in words is "seventy-seven million, three hundred thirteen thousand, three hundred seventeen".