239821961 has 8 divisors (see below), whose sum is σ = 244546560. Its totient is φ = 235119472.

The previous prime is 239821951. The next prime is 239821963. The reversal of 239821961 is 169128932.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239821961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239821963) 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, 17291 + ... + 27903.

It is an arithmetic number, because the mean of its divisors is an integer number (30568320).

Almost surely, 2^239821961 is an apocalyptic number.

It is an amenable number.

239821961 is a deficient number, since it is larger than the sum of its proper divisors (4724599).

239821961 is a wasteful number, since it uses less digits than its factorization.

239821961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055.

The product of its digits is 46656, while the sum is 41.

The square root of 239821961 is about 15486.1861347460. The cubic root of 239821961 is about 621.2927941297.

The spelling of 239821961 in words is "two hundred thirty-nine million, eight hundred twenty-one thousand, nine hundred sixty-one".