309136933 has 12 divisors (see below), whose sum is σ = 367973760. Its totient is φ = 258810552.

The previous prime is 309136879. The next prime is 309136937. The reversal of 309136933 is 339631903.

It is not a de Polignac number, because 309136933 - 2¹³ = 309128741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309136892 and 309136901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309136937) 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 11 ways as a sum of consecutive naturals, for example, 71253 + ... + 75466.

It is an arithmetic number, because the mean of its divisors is an integer number (30664480).

Almost surely, 2^309136933 is an apocalyptic number.

It is an amenable number.

309136933 is a deficient number, since it is larger than the sum of its proper divisors (58836827).

309136933 is a wasteful number, since it uses less digits than its factorization.

309136933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146776 (or 146769 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 37.

The square root of 309136933 is about 17582.2903229357. The cubic root of 309136933 is about 676.1612807124.

The spelling of 309136933 in words is "three hundred nine million, one hundred thirty-six thousand, nine hundred thirty-three".