123129950 has 24 divisors (see below), whose sum is σ = 229455552. Its totient is φ = 49158720.

The previous prime is 123129931. The next prime is 123129959. The reversal of 123129950 is 59921321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123129959) 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, 28322 + ... + 32378.

It is an arithmetic number, because the mean of its divisors is an integer number (9560648).

Almost surely, 2^123129950 is an apocalyptic number.

123129950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123129950 is a deficient number, since it is larger than the sum of its proper divisors (106325602).

123129950 is a wasteful number, since it uses less digits than its factorization.

123129950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676 (or 4671 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 123129950 is about 11096.3935582693. The cubic root of 123129950 is about 497.4940615269.

The spelling of 123129950 in words is "one hundred twenty-three million, one hundred twenty-nine thousand, nine hundred fifty".