309868867 has 16 divisors (see below), whose sum is σ = 391629312. Its totient is φ = 238144320.

The previous prime is 309868829. The next prime is 309868873. The reversal of 309868867 is 768868903.

It is a cyclic number.

It is not a de Polignac number, because 309868867 - 2²⁷ = 175651139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309868807) 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 15 ways as a sum of consecutive naturals, for example, 21943 + ... + 33184.

It is an arithmetic number, because the mean of its divisors is an integer number (24476832).

Almost surely, 2^309868867 is an apocalyptic number.

309868867 is a deficient number, since it is larger than the sum of its proper divisors (81760445).

309868867 is a wasteful number, since it uses less digits than its factorization.

309868867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55218.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 309868867 is about 17603.0925408009. The cubic root of 309868867 is about 676.6945021862.

The spelling of 309868867 in words is "three hundred nine million, eight hundred sixty-eight thousand, eight hundred sixty-seven".