117947579 has 2 divisors, whose sum is σ = 117947580. Its totient is φ = 117947578.

The previous prime is 117947563. The next prime is 117947593. The reversal of 117947579 is 975749711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117947579 - 2⁴ = 117947563 is a prime.

It is a super-2 number, since 2×117947579² = 27823262783922482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117947539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58973789 + 58973790.

It is an arithmetic number, because the mean of its divisors is an integer number (58973790).

Almost surely, 2^117947579 is an apocalyptic number.

117947579 is a deficient number, since it is larger than the sum of its proper divisors (1).

117947579 is an equidigital number, since it uses as much as digits as its factorization.

117947579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 50.

The square root of 117947579 is about 10860.3673510614. The cubic root of 117947579 is about 490.4141701648.

The spelling of 117947579 in words is "one hundred seventeen million, nine hundred forty-seven thousand, five hundred seventy-nine".