118790909 has 2 divisors, whose sum is σ = 118790910. Its totient is φ = 118790908.

The previous prime is 118790891. The next prime is 118790963. The reversal of 118790909 is 909097811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111619225 + 7171684 = 10565^2 + 2678^2 .

It is an emirp because it is prime and its reverse (909097811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118790909 is a prime.

It is a super-2 number, since 2×118790909² = 28222560122092562, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118790909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118790809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59395454 + 59395455.

It is an arithmetic number, because the mean of its divisors is an integer number (59395455).

Almost surely, 2^118790909 is an apocalyptic number.

It is an amenable number.

118790909 is a deficient number, since it is larger than the sum of its proper divisors (1).

118790909 is an equidigital number, since it uses as much as digits as its factorization.

118790909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 118790909 is about 10899.1242308729. The cubic root of 118790909 is about 491.5802225630.

The spelling of 118790909 in words is "one hundred eighteen million, seven hundred ninety thousand, nine hundred nine".