239148921 has 16 divisors (see below), whose sum is σ = 348965568. Its totient is φ = 144475200.

The previous prime is 239148913. The next prime is 239148937. The reversal of 239148921 is 129841932.

It is not a de Polignac number, because 239148921 - 2³ = 239148913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239148921.

It is not an unprimeable number, because it can be changed into a prime (239148901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (21810348).

Almost surely, 2^239148921 is an apocalyptic number.

It is an amenable number.

239148921 is a deficient number, since it is larger than the sum of its proper divisors (109816647).

239148921 is a wasteful number, since it uses less digits than its factorization.

239148921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23192.

The product of its digits is 31104, while the sum is 39.

The square root of 239148921 is about 15464.4405330422. The cubic root of 239148921 is about 620.7110477326.

The spelling of 239148921 in words is "two hundred thirty-nine million, one hundred forty-eight thousand, nine hundred twenty-one".