909949509 has 12 divisors (see below), whose sum is σ = 1502138976. Its totient is φ = 519971112.

The previous prime is 909949499. The next prime is 909949511. The reversal of 909949509 is 905949909.

It is a happy number.

909949509 is a `hidden beast` number, since 9 + 0 + 99 + 49 + 509 = 666.

It is not a de Polignac number, because 909949509 - 2⁵ = 909949477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909949009) 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, 7221759 + ... + 7221884.

It is an arithmetic number, because the mean of its divisors is an integer number (125178248).

Almost surely, 2^909949509 is an apocalyptic number.

It is an amenable number.

909949509 is a deficient number, since it is larger than the sum of its proper divisors (592189467).

909949509 is a wasteful number, since it uses less digits than its factorization.

909949509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14443656 (or 14443653 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 909949509 is about 30165.3693662120. The cubic root of 909949509 is about 969.0341855174.

The spelling of 909949509 in words is "nine hundred nine million, nine hundred forty-nine thousand, five hundred nine".