239128929 has 20 divisors (see below), whose sum is σ = 384697236. Its totient is φ = 147155616.

The previous prime is 239128909. The next prime is 239128943. The reversal of 239128929 is 929821932.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137522529 + 101606400 = 11727^2 + 10080^2 .

It is a de Polignac number, because none of the positive numbers 2^k-239128929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (239128909) 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 in 19 ways as a sum of consecutive naturals, for example, 112494 + ... + 114599.

Almost surely, 2^239128929 is an apocalyptic number.

It is an amenable number.

239128929 is a deficient number, since it is larger than the sum of its proper divisors (145568307).

239128929 is a wasteful number, since it uses less digits than its factorization.

239128929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227118 (or 227109 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 239128929 is about 15463.7941333943. The cubic root of 239128929 is about 620.6937508379.

The spelling of 239128929 in words is "two hundred thirty-nine million, one hundred twenty-eight thousand, nine hundred twenty-nine".