117519979 has 2 divisors, whose sum is σ = 117519980. Its totient is φ = 117519978.

The previous prime is 117519971. The next prime is 117520001. The reversal of 117519979 is 979915711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117519979 - 2³ = 117519971 is a prime.

It is not a weakly prime, because it can be changed into another prime (117519971) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58759989 + 58759990.

It is an arithmetic number, because the mean of its divisors is an integer number (58759990).

Almost surely, 2^117519979 is an apocalyptic number.

117519979 is a deficient number, since it is larger than the sum of its proper divisors (1).

117519979 is an equidigital number, since it uses as much as digits as its factorization.

117519979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 178605, while the sum is 49.

The square root of 117519979 is about 10840.6632177187. The cubic root of 117519979 is about 489.8208132822.

The spelling of 117519979 in words is "one hundred seventeen million, five hundred nineteen thousand, nine hundred seventy-nine".