117656579 has 2 divisors, whose sum is σ = 117656580. Its totient is φ = 117656578.

The previous prime is 117656549. The next prime is 117656599. The reversal of 117656579 is 975656711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117656579 - 2¹⁶ = 117591043 is a prime.

It is not a weakly prime, because it can be changed into another prime (117656549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58828289 + 58828290.

It is an arithmetic number, because the mean of its divisors is an integer number (58828290).

Almost surely, 2^117656579 is an apocalyptic number.

117656579 is a deficient number, since it is larger than the sum of its proper divisors (1).

117656579 is an equidigital number, since it uses as much as digits as its factorization.

117656579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 47.

The square root of 117656579 is about 10846.9617405060. The cubic root of 117656579 is about 490.0105217788.

The spelling of 117656579 in words is "one hundred seventeen million, six hundred fifty-six thousand, five hundred seventy-nine".