309690914 has 16 divisors (see below), whose sum is σ = 500561208. Its totient is φ = 142851072.

The previous prime is 309690869. The next prime is 309690919. The reversal of 309690914 is 419096903.

It can be written as a sum of positive squares in 4 ways, for example, as 225510289 + 84180625 = 15017^2 + 9175^2 .

It is not an unprimeable number, because it can be changed into a prime (309690919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79664 + ... + 83460.

Almost surely, 2^309690914 is an apocalyptic number.

309690914 is a deficient number, since it is larger than the sum of its proper divisors (190870294).

309690914 is a wasteful number, since it uses less digits than its factorization.

309690914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 309690914 is about 17598.0372200993. The cubic root of 309690914 is about 676.5649389110.

The spelling of 309690914 in words is "three hundred nine million, six hundred ninety thousand, nine hundred fourteen".