200972509 has 6 divisors (see below), whose sum is σ = 201746906. Its totient is φ = 200201040.

The previous prime is 200972501. The next prime is 200972531. The reversal of 200972509 is 905279002.

It can be written as a sum of positive squares in 3 ways, for example, as 146168100 + 54804409 = 12090^2 + 7403^2 .

It is not a de Polignac number, because 200972509 - 2³ = 200972501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200972501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84679 + ... + 87019.

Almost surely, 2^200972509 is an apocalyptic number.

It is an amenable number.

200972509 is a deficient number, since it is larger than the sum of its proper divisors (774397).

200972509 is an frugal number, since it uses more digits than its factorization.

200972509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927 (or 2634 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 200972509 is about 14176.4773127883. The cubic root of 200972509 is about 585.7498932688.

The spelling of 200972509 in words is "two hundred million, nine hundred seventy-two thousand, five hundred nine".