309012929 has 12 divisors (see below), whose sum is σ = 322318080. Its totient is φ = 295948080.

The previous prime is 309012923. The next prime is 309012947. The reversal of 309012929 is 929210903.

It is not a de Polignac number, because 309012929 - 2¹⁶ = 308947393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309012923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367892 + ... + 368730.

It is an arithmetic number, because the mean of its divisors is an integer number (26859840).

Almost surely, 2^309012929 is an apocalyptic number.

It is an amenable number.

309012929 is a deficient number, since it is larger than the sum of its proper divisors (13305151).

309012929 is an equidigital number, since it uses as much as digits as its factorization.

309012929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 309012929 is about 17578.7635799564. The cubic root of 309012929 is about 676.0708591677.

The spelling of 309012929 in words is "three hundred nine million, twelve thousand, nine hundred twenty-nine".