209125364 has 24 divisors (see below), whose sum is σ = 442854720. Its totient is φ = 84352896.

The previous prime is 209125331. The next prime is 209125391. The reversal of 209125364 is 463521902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 209125364.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219194 + ... + 220145.

It is an arithmetic number, because the mean of its divisors is an integer number (18452280).

Almost surely, 2^209125364 is an apocalyptic number.

It is an amenable number.

209125364 is an abundant number, since it is smaller than the sum of its proper divisors (233729356).

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

209125364 is a wasteful number, since it uses less digits than its factorization.

209125364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439367 (or 439365 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 209125364 is about 14461.1674494143. The cubic root of 209125364 is about 593.5658456929.

The spelling of 209125364 in words is "two hundred nine million, one hundred twenty-five thousand, three hundred sixty-four".