309223147 has 6 divisors (see below), whose sum is σ = 315170492. Its totient is φ = 303385992.

The previous prime is 309223139. The next prime is 309223163. The reversal of 309223147 is 741322903.

It is not a de Polignac number, because 309223147 - 2³ = 309223139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (309223847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52233 + ... + 57850.

Almost surely, 2^309223147 is an apocalyptic number.

309223147 is a deficient number, since it is larger than the sum of its proper divisors (5947345).

309223147 is an equidigital number, since it uses as much as digits as its factorization.

309223147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110189 (or 110136 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 309223147 is about 17584.7418803916. The cubic root of 309223147 is about 676.2241322022.

The spelling of 309223147 in words is "three hundred nine million, two hundred twenty-three thousand, one hundred forty-seven".