118623809 has 4 divisors (see below), whose sum is σ = 118755504. Its totient is φ = 118492116.

The previous prime is 118623787. The next prime is 118623823. The reversal of 118623809 is 908326811.

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.

It is a cyclic number.

It is not a de Polignac number, because 118623809 - 2¹² = 118619713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118623829) 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, 64487 + ... + 66300.

It is an arithmetic number, because the mean of its divisors is an integer number (29688876).

Almost surely, 2^118623809 is an apocalyptic number.

It is an amenable number.

118623809 is a deficient number, since it is larger than the sum of its proper divisors (131695).

118623809 is an equidigital number, since it uses as much as digits as its factorization.

118623809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131694.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 118623809 is about 10891.4557796467. The cubic root of 118623809 is about 491.3496168088.

The spelling of 118623809 in words is "one hundred eighteen million, six hundred twenty-three thousand, eight hundred nine".