123865994 has 32 divisors (see below), whose sum is σ = 222462720. Its totient is φ = 50573952.

The previous prime is 123865991. The next prime is 123866003. The reversal of 123865994 is 499568321.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123865991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100172 + ... + 101400.

It is an arithmetic number, because the mean of its divisors is an integer number (6951960).

Almost surely, 2^123865994 is an apocalyptic number.

123865994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123865994 is a deficient number, since it is larger than the sum of its proper divisors (98596726).

123865994 is a wasteful number, since it uses less digits than its factorization.

123865994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its digits is 466560, while the sum is 47.

The square root of 123865994 is about 11129.5100521092. The cubic root of 123865994 is about 498.4833964786.

The spelling of 123865994 in words is "one hundred twenty-three million, eight hundred sixty-five thousand, nine hundred ninety-four".