239640923 has 8 divisors (see below), whose sum is σ = 241449936. Its totient is φ = 237837600.

The previous prime is 239640917. The next prime is 239640953. The reversal of 239640923 is 329046932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 239640923 - 2²² = 235446619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239640953) 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 7 ways as a sum of consecutive naturals, for example, 118640 + ... + 120642.

It is an arithmetic number, because the mean of its divisors is an integer number (30181242).

Almost surely, 2^239640923 is an apocalyptic number.

239640923 is a deficient number, since it is larger than the sum of its proper divisors (1809013).

239640923 is a wasteful number, since it uses less digits than its factorization.

239640923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 239640923 is about 15480.3398864495. The cubic root of 239640923 is about 621.1364199055.

The spelling of 239640923 in words is "two hundred thirty-nine million, six hundred forty thousand, nine hundred twenty-three".