172137930 has 32 divisors (see below), whose sum is σ = 416294208. Its totient is φ = 45552000.

The previous prime is 172137907. The next prime is 172137961. The reversal of 172137930 is 39731271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 172137891 and 172137900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17971 + ... + 25830.

It is an arithmetic number, because the mean of its divisors is an integer number (13009194).

Almost surely, 2^172137930 is an apocalyptic number.

172137930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172137930 is an abundant number, since it is smaller than the sum of its proper divisors (244156278).

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

172137930 is a wasteful number, since it uses less digits than its factorization.

172137930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43942.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 172137930 is about 13120.1345267493. The cubic root of 172137930 is about 556.2783938711.

The spelling of 172137930 in words is "one hundred seventy-two million, one hundred thirty-seven thousand, nine hundred thirty".