239564641 has 4 divisors (see below), whose sum is σ = 239733252. Its totient is φ = 239396032.

The previous prime is 239564623. The next prime is 239564701. The reversal of 239564641 is 146465932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120121600 + 119443041 = 10960^2 + 10929^2 .

It is a cyclic number.

It is not a de Polignac number, because 239564641 - 2⁵ = 239564609 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239564594 and 239564603.

It is not an unprimeable number, because it can be changed into a prime (239564341) 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, 82156 + ... + 85021.

It is an arithmetic number, because the mean of its divisors is an integer number (59933313).

Almost surely, 2^239564641 is an apocalyptic number.

It is an amenable number.

239564641 is a deficient number, since it is larger than the sum of its proper divisors (168611).

239564641 is a wasteful number, since it uses less digits than its factorization.

239564641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168610.

The product of its digits is 155520, while the sum is 40.

The square root of 239564641 is about 15477.8758555559. The cubic root of 239564641 is about 621.0705066269.

The spelling of 239564641 in words is "two hundred thirty-nine million, five hundred sixty-four thousand, six hundred forty-one".