309966129 has 16 divisors (see below), whose sum is σ = 500955840. Its totient is φ = 187858080.

The previous prime is 309966127. The next prime is 309966143. The reversal of 309966129 is 921669903.

It is a happy number.

It is not a de Polignac number, because 309966129 - 2¹ = 309966127 is a prime.

It is a super-2 number, since 2×309966129² = 192158002254489282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309966121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521532 + ... + 522125.

It is an arithmetic number, because the mean of its divisors is an integer number (31309740).

Almost surely, 2^309966129 is an apocalyptic number.

It is an amenable number.

309966129 is a deficient number, since it is larger than the sum of its proper divisors (190989711).

309966129 is a wasteful number, since it uses less digits than its factorization.

309966129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043677 (or 1043671 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 309966129 is about 17605.8549636193. The cubic root of 309966129 is about 676.7652953320.

The spelling of 309966129 in words is "three hundred nine million, nine hundred sixty-six thousand, one hundred twenty-nine".