239538947 has 4 divisors (see below), whose sum is σ = 252146280. Its totient is φ = 226931616.

The previous prime is 239538941. The next prime is 239538977. The reversal of 239538947 is 749835932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 239538947 - 2¹⁰ = 239537923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239538895 and 239538904.

It is not an unprimeable number, because it can be changed into a prime (239538941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6303638 + ... + 6303675.

It is an arithmetic number, because the mean of its divisors is an integer number (63036570).

Almost surely, 2^239538947 is an apocalyptic number.

239538947 is a deficient number, since it is larger than the sum of its proper divisors (12607333).

239538947 is a wasteful number, since it uses less digits than its factorization.

239538947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12607332.

The product of its digits is 1632960, while the sum is 50.

The square root of 239538947 is about 15477.0458098437. The cubic root of 239538947 is about 621.0483019642.

The spelling of 239538947 in words is "two hundred thirty-nine million, five hundred thirty-eight thousand, nine hundred forty-seven".