118290791 has 4 divisors (see below), whose sum is σ = 118314000. Its totient is φ = 118267584.

The previous prime is 118290779. The next prime is 118290793. The reversal of 118290791 is 197092811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197092811 = 2551 ⋅77261.

It is a cyclic number.

It is not a de Polignac number, because 118290791 - 2⁶ = 118290727 is a prime.

It is a super-2 number, since 2×118290791² = 27985422470811362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118290793) 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, 266 + ... + 15383.

It is an arithmetic number, because the mean of its divisors is an integer number (29578500).

Almost surely, 2^118290791 is an apocalyptic number.

118290791 is a deficient number, since it is larger than the sum of its proper divisors (23209).

118290791 is an equidigital number, since it uses as much as digits as its factorization.

118290791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23208.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 118290791 is about 10876.1569959246. The cubic root of 118290791 is about 490.8893898452.

The spelling of 118290791 in words is "one hundred eighteen million, two hundred ninety thousand, seven hundred ninety-one".