123901900 has 36 divisors (see below), whose sum is σ = 276142048. Its totient is φ = 48219840.

The previous prime is 123901879. The next prime is 123901903. The reversal of 123901900 is 9109321.

It is a super-2 number, since 2×123901900² = 30703361647220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (123901903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13044 + ... + 20443.

Almost surely, 2^123901900 is an apocalyptic number.

123901900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123901900 is an abundant number, since it is smaller than the sum of its proper divisors (152240148).

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

123901900 is a wasteful number, since it uses less digits than its factorization.

123901900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33538 (or 33531 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 123901900 is about 11131.1230340878. The cubic root of 123901900 is about 498.5315582462.

The spelling of 123901900 in words is "one hundred twenty-three million, nine hundred one thousand, nine hundred".