102173920 has 24 divisors (see below), whose sum is σ = 241386264. Its totient is φ = 40869504.

The previous prime is 102173879. The next prime is 102173941. The reversal of 102173920 is 29371201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319134 + ... + 319453.

It is an arithmetic number, because the mean of its divisors is an integer number (10057761).

Almost surely, 2^102173920 is an apocalyptic number.

102173920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102173920 is an abundant number, since it is smaller than the sum of its proper divisors (139212344).

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

102173920 is an equidigital number, since it uses as much as digits as its factorization.

102173920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638602 (or 638594 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 102173920 is about 10108.1115941604. Note that the first 3 decimals coincide. The cubic root of 102173920 is about 467.4982813286.

The spelling of 102173920 in words is "one hundred two million, one hundred seventy-three thousand, nine hundred twenty".