672202809 has 12 divisors (see below), whose sum is σ = 975890916. Its totient is φ = 445859232.

The previous prime is 672202801. The next prime is 672202813. The reversal of 672202809 is 908202276.

It can be written as a sum of positive squares in 2 ways, for example, as 653927184 + 18275625 = 25572^2 + 4275^2 .

It is not a de Polignac number, because 672202809 - 2³ = 672202801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (672202801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187794 + ... + 191339.

It is an arithmetic number, because the mean of its divisors is an integer number (81324243).

Almost surely, 2^672202809 is an apocalyptic number.

It is an amenable number.

672202809 is a deficient number, since it is larger than the sum of its proper divisors (303688107).

672202809 is a wasteful number, since it uses less digits than its factorization.

672202809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379336 (or 379333 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 672202809 is about 25926.8742620471. The cubic root of 672202809 is about 875.9919347791.

The spelling of 672202809 in words is "six hundred seventy-two million, two hundred two thousand, eight hundred nine".