123139954 has 8 divisors (see below), whose sum is σ = 211097088. Its totient is φ = 52774260.

The previous prime is 123139949. The next prime is 123139979. The reversal of 123139954 is 459931321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×123139954² = 30326896542244232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4397842 + ... + 4397869.

It is an arithmetic number, because the mean of its divisors is an integer number (26387136).

Almost surely, 2^123139954 is an apocalyptic number.

123139954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123139954 is a deficient number, since it is larger than the sum of its proper divisors (87957134).

123139954 is an equidigital number, since it uses as much as digits as its factorization.

123139954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8795720.

The product of its digits is 29160, while the sum is 37.

The square root of 123139954 is about 11096.8443262037. The cubic root of 123139954 is about 497.5075345441.

The spelling of 123139954 in words is "one hundred twenty-three million, one hundred thirty-nine thousand, nine hundred fifty-four".