123809994 has 48 divisors (see below), whose sum is σ = 334451520. Its totient is φ = 32158080.

The previous prime is 123809993. The next prime is 123809999. The reversal of 123809994 is 499908321.

It is a super-2 number, since 2×123809994² = 30657829228560072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (123809993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43279 + ... + 46050.

It is an arithmetic number, because the mean of its divisors is an integer number (6967740).

Almost surely, 2^123809994 is an apocalyptic number.

123809994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123809994 is an abundant number, since it is smaller than the sum of its proper divisors (210641526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123809994 is a wasteful number, since it uses less digits than its factorization.

123809994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89355 (or 89352 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 123809994 is about 11126.9939336732. The cubic root of 123809994 is about 498.4082634601.

The spelling of 123809994 in words is "one hundred twenty-three million, eight hundred nine thousand, nine hundred ninety-four".