909072213 has 32 divisors (see below), whose sum is σ = 1423118592. Its totient is φ = 505344000.

The previous prime is 909072209. The next prime is 909072221. The reversal of 909072213 is 312270909.

It is not a de Polignac number, because 909072213 - 2² = 909072209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909072253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343945 + ... + 346577.

It is an arithmetic number, because the mean of its divisors is an integer number (44472456).

Almost surely, 2^909072213 is an apocalyptic number.

It is an amenable number.

909072213 is a deficient number, since it is larger than the sum of its proper divisors (514046379).

909072213 is a wasteful number, since it uses less digits than its factorization.

909072213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 909072213 is about 30150.8244165893. The cubic root of 909072213 is about 968.7226652405.

The spelling of 909072213 in words is "nine hundred nine million, seventy-two thousand, two hundred thirteen".