239151961 has 2 divisors, whose sum is σ = 239151962. Its totient is φ = 239151960.

The previous prime is 239151947. The next prime is 239151973. The reversal of 239151961 is 169151932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131905225 + 107246736 = 11485^2 + 10356^2 .

It is a cyclic number.

It is not a de Polignac number, because 239151961 - 2⁵ = 239151929 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239151961.

It is not a weakly prime, because it can be changed into another prime (239151911) 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 as a sum of consecutive naturals, namely, 119575980 + 119575981.

It is an arithmetic number, because the mean of its divisors is an integer number (119575981).

Almost surely, 2^239151961 is an apocalyptic number.

It is an amenable number.

239151961 is a deficient number, since it is larger than the sum of its proper divisors (1).

239151961 is an equidigital number, since it uses as much as digits as its factorization.

239151961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 37.

The square root of 239151961 is about 15464.5388227389. The cubic root of 239151961 is about 620.7136778282.

The spelling of 239151961 in words is "two hundred thirty-nine million, one hundred fifty-one thousand, nine hundred sixty-one".