77315629 has 2 divisors, whose sum is σ = 77315630. Its totient is φ = 77315628.

The previous prime is 77315597. The next prime is 77315647. The reversal of 77315629 is 92651377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77264100 + 51529 = 8790^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 77315629 - 2⁵ = 77315597 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77315591 and 77315600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77315669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38657814 + 38657815.

It is an arithmetic number, because the mean of its divisors is an integer number (38657815).

Almost surely, 2^77315629 is an apocalyptic number.

It is an amenable number.

77315629 is a deficient number, since it is larger than the sum of its proper divisors (1).

77315629 is an equidigital number, since it uses as much as digits as its factorization.

77315629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 77315629 is about 8792.9306263612. The cubic root of 77315629 is about 426.0125871511.

The spelling of 77315629 in words is "seventy-seven million, three hundred fifteen thousand, six hundred twenty-nine".