103509920 has 24 divisors (see below), whose sum is σ = 244542564. Its totient is φ = 41403904.

The previous prime is 103509919. The next prime is 103509983. The reversal of 103509920 is 29905301.

It can be written as a sum of positive squares in 2 ways, for example, as 100080016 + 3429904 = 10004^2 + 1852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323309 + ... + 323628.

Almost surely, 2^103509920 is an apocalyptic number.

103509920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103509920 is an abundant number, since it is smaller than the sum of its proper divisors (141032644).

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

103509920 is an equidigital number, since it uses as much as digits as its factorization.

103509920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646952 (or 646944 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 103509920 is about 10173.9825044080. The cubic root of 103509920 is about 469.5270933641.

The spelling of 103509920 in words is "one hundred three million, five hundred nine thousand, nine hundred twenty".