309493516 has 12 divisors (see below), whose sum is σ = 543357360. Its totient is φ = 154248560.

The previous prime is 309493487. The next prime is 309493523. The reversal of 309493516 is 615394903.

309493516 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123151 + ... + 125638.

It is an arithmetic number, because the mean of its divisors is an integer number (45279780).

Almost surely, 2^309493516 is an apocalyptic number.

It is an amenable number.

309493516 is a deficient number, since it is larger than the sum of its proper divisors (233863844).

309493516 is a wasteful number, since it uses less digits than its factorization.

309493516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249104 (or 249102 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 309493516 is about 17592.4278028929. The cubic root of 309493516 is about 676.4211601244.

The spelling of 309493516 in words is "three hundred nine million, four hundred ninety-three thousand, five hundred sixteen".