117764579 has 2 divisors, whose sum is σ = 117764580. Its totient is φ = 117764578.

The previous prime is 117764561. The next prime is 117764617. The reversal of 117764579 is 975467711.

It is a weak prime.

It is an emirp because it is prime and its reverse (975467711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117764579 is a prime.

It is not a weakly prime, because it can be changed into another prime (117764519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58882289 + 58882290.

It is an arithmetic number, because the mean of its divisors is an integer number (58882290).

Almost surely, 2^117764579 is an apocalyptic number.

117764579 is a deficient number, since it is larger than the sum of its proper divisors (1).

117764579 is an equidigital number, since it uses as much as digits as its factorization.

117764579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 47.

The square root of 117764579 is about 10851.9389511737. The cubic root of 117764579 is about 490.1604070140.

It can be divided in two parts, 1177 and 64579, that added together give a palindrome (65756).

The spelling of 117764579 in words is "one hundred seventeen million, seven hundred sixty-four thousand, five hundred seventy-nine".