239242891 has 2 divisors, whose sum is σ = 239242892. Its totient is φ = 239242890.

The previous prime is 239242879. The next prime is 239242937. The reversal of 239242891 is 198242932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 239242891 - 2⁵ = 239242859 is a prime.

It is not a weakly prime, because it can be changed into another prime (239242291) 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, 119621445 + 119621446.

It is an arithmetic number, because the mean of its divisors is an integer number (119621446).

Almost surely, 2^239242891 is an apocalyptic number.

239242891 is a deficient number, since it is larger than the sum of its proper divisors (1).

239242891 is an equidigital number, since it uses as much as digits as its factorization.

239242891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 239242891 is about 15467.4784952170. The cubic root of 239242891 is about 620.7923368011.

The spelling of 239242891 in words is "two hundred thirty-nine million, two hundred forty-two thousand, eight hundred ninety-one".