309676 has 6 divisors (see below), whose sum is σ = 541940. Its totient is φ = 154836.

The previous prime is 309671. The next prime is 309677. The reversal of 309676 is 676903.

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

It is not an unprimeable number, because it can be changed into a prime (309671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38706 + ... + 38713.

2³⁰⁹⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

309676 is a deficient number, since it is larger than the sum of its proper divisors (232264).

309676 is a wasteful number, since it uses less digits than its factorization.

309676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77423 (or 77421 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 309676 is about 556.4853996288. The cubic root of 309676 is about 67.6554078134.

The spelling of 309676 in words is "three hundred nine thousand, six hundred seventy-six".