118947913 has 4 divisors (see below), whose sum is σ = 135940480. Its totient is φ = 101955348.

The previous prime is 118947901. The next prime is 118947943. The reversal of 118947913 is 319749811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319749811 = 157 ⋅2036623.

It is a cyclic number.

It is not a de Polignac number, because 118947913 - 2²¹ = 116850761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118947913.

It is not an unprimeable number, because it can be changed into a prime (118947943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8496273 + ... + 8496286.

It is an arithmetic number, because the mean of its divisors is an integer number (33985120).

Almost surely, 2^118947913 is an apocalyptic number.

It is an amenable number.

118947913 is a deficient number, since it is larger than the sum of its proper divisors (16992567).

118947913 is an equidigital number, since it uses as much as digits as its factorization.

118947913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16992566.

The product of its digits is 54432, while the sum is 43.

The square root of 118947913 is about 10906.3244496026. The cubic root of 118947913 is about 491.7966983980.

The spelling of 118947913 in words is "one hundred eighteen million, nine hundred forty-seven thousand, nine hundred thirteen".