118879991 has 2 divisors, whose sum is σ = 118879992. Its totient is φ = 118879990.

The previous prime is 118879973. The next prime is 118880029. The reversal of 118879991 is 199978811.

It is a weak prime.

It is an emirp because it is prime and its reverse (199978811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118879991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118879921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59439995 + 59439996.

It is an arithmetic number, because the mean of its divisors is an integer number (59439996).

Almost surely, 2^118879991 is an apocalyptic number.

118879991 is a deficient number, since it is larger than the sum of its proper divisors (1).

118879991 is an equidigital number, since it uses as much as digits as its factorization.

118879991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 53.

The square root of 118879991 is about 10903.2101236287. The cubic root of 118879991 is about 491.7030714912.

The spelling of 118879991 in words is "one hundred eighteen million, eight hundred seventy-nine thousand, nine hundred ninety-one".