209623125 has 20 divisors (see below), whose sum is σ = 349263200. Its totient is φ = 111798000.

The previous prime is 209623097. The next prime is 209623133. The reversal of 209623125 is 521326902.

It is not a de Polignac number, because 209623125 - 2⁶ = 209623061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209623092 and 209623101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54025 + ... + 57774.

It is an arithmetic number, because the mean of its divisors is an integer number (17463160).

Almost surely, 2^209623125 is an apocalyptic number.

209623125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

209623125 is a deficient number, since it is larger than the sum of its proper divisors (139640075).

209623125 is an equidigital number, since it uses as much as digits as its factorization.

209623125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111822 (or 111807 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 209623125 is about 14478.3674839396. The cubic root of 209623125 is about 594.0364084521.

The spelling of 209623125 in words is "two hundred nine million, six hundred twenty-three thousand, one hundred twenty-five".