309677 has 2 divisors, whose sum is σ = 309678. Its totient is φ = 309676.

The previous prime is 309671. The next prime is 309707. The reversal of 309677 is 776903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 106276 = 451^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 309677 - 2¹² = 305581 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 309677.

It is not a weakly prime, because it can be changed into another prime (309671) 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 as a sum of consecutive naturals, namely, 154838 + 154839.

It is an arithmetic number, because the mean of its divisors is an integer number (154839).

2³⁰⁹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

309677 is a deficient number, since it is larger than the sum of its proper divisors (1).

309677 is an equidigital number, since it uses as much as digits as its factorization.

309677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 309677 is about 556.4862981242. The cubic root of 309677 is about 67.6554806372.

The spelling of 309677 in words is "three hundred nine thousand, six hundred seventy-seven".