118978459 has 2 divisors, whose sum is σ = 118978460. Its totient is φ = 118978458.

The previous prime is 118978451. The next prime is 118978547. The reversal of 118978459 is 954879811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118978459 - 2³ = 118978451 is a prime.

It is not a weakly prime, because it can be changed into another prime (118978451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59489229 + 59489230.

It is an arithmetic number, because the mean of its divisors is an integer number (59489230).

Almost surely, 2^118978459 is an apocalyptic number.

118978459 is a deficient number, since it is larger than the sum of its proper divisors (1).

118978459 is an equidigital number, since it uses as much as digits as its factorization.

118978459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 52.

The square root of 118978459 is about 10907.7247398346. The cubic root of 118978459 is about 491.8387928348.

The spelling of 118978459 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, four hundred fifty-nine".