309134847 has 16 divisors (see below), whose sum is σ = 473091840. Its totient is φ = 175887552.

The previous prime is 309134831. The next prime is 309134857. The reversal of 309134847 is 748431903.

It is not a de Polignac number, because 309134847 - 2⁴ = 309134831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309134857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26697 + ... + 36482.

It is an arithmetic number, because the mean of its divisors is an integer number (29568240).

Almost surely, 2^309134847 is an apocalyptic number.

309134847 is a deficient number, since it is larger than the sum of its proper divisors (163956993).

309134847 is a wasteful number, since it uses less digits than its factorization.

309134847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63422.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 309134847 is about 17582.2310017813. The cubic root of 309134847 is about 676.1597598378.

The spelling of 309134847 in words is "three hundred nine million, one hundred thirty-four thousand, eight hundred forty-seven".