77715097 has 2 divisors, whose sum is σ = 77715098. Its totient is φ = 77715096.

The previous prime is 77715023. The next prime is 77715103. The reversal of 77715097 is 79051777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74718736 + 2996361 = 8644^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 77715097 - 2²³ = 69326489 is a prime.

It is not a weakly prime, because it can be changed into another prime (77715497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38857548 + 38857549.

It is an arithmetic number, because the mean of its divisors is an integer number (38857549).

Almost surely, 2^77715097 is an apocalyptic number.

It is an amenable number.

77715097 is a deficient number, since it is larger than the sum of its proper divisors (1).

77715097 is an equidigital number, since it uses as much as digits as its factorization.

77715097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108045, while the sum is 43.

The square root of 77715097 is about 8815.6166545512. The cubic root of 77715097 is about 426.7450227051.

The spelling of 77715097 in words is "seventy-seven million, seven hundred fifteen thousand, ninety-seven".