118890709 has 6 divisors (see below), whose sum is σ = 138301494. Its totient is φ = 101906280.

The previous prime is 118890697. The next prime is 118890719. The reversal of 118890709 is 907098811.

It can be written as a sum of positive squares in only one way, i.e., 64352484 + 54538225 = 8022^2 + 7385^2 .

It is not a de Polignac number, because 118890709 - 2⁵ = 118890677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118890719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213122 + ... + 1213219.

It is an arithmetic number, because the mean of its divisors is an integer number (23050249).

Almost surely, 2^118890709 is an apocalyptic number.

It is an amenable number.

118890709 is a deficient number, since it is larger than the sum of its proper divisors (19410785).

118890709 is an equidigital number, since it uses as much as digits as its factorization.

118890709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426355 (or 2426348 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 118890709 is about 10903.7016191750. The cubic root of 118890709 is about 491.7178480602.

The spelling of 118890709 in words is "one hundred eighteen million, eight hundred ninety thousand, seven hundred nine".