123172950 has 24 divisors (see below), whose sum is σ = 305469288. Its totient is φ = 32846080.

The previous prime is 123172927. The next prime is 123172957. The reversal of 123172950 is 59271321.

It is a super-2 number, since 2×123172950² = 30343151223405000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123172957) 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, 410427 + ... + 410726.

It is an arithmetic number, because the mean of its divisors is an integer number (12727887).

Almost surely, 2^123172950 is an apocalyptic number.

123172950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123172950 is an abundant number, since it is smaller than the sum of its proper divisors (182296338).

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

123172950 is a wasteful number, since it uses less digits than its factorization.

123172950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821168 (or 821163 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 123172950 is about 11098.3309555987. The cubic root of 123172950 is about 497.5519671648.

The spelling of 123172950 in words is "one hundred twenty-three million, one hundred seventy-two thousand, nine hundred fifty".