239664097 has 2 divisors, whose sum is σ = 239664098. Its totient is φ = 239664096.

The previous prime is 239664041. The next prime is 239664109. The reversal of 239664097 is 790466932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238887936 + 776161 = 15456^2 + 881^2 .

It is a cyclic number.

It is not a de Polignac number, because 239664097 - 2⁷ = 239663969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (239664197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119832048 + 119832049.

It is an arithmetic number, because the mean of its divisors is an integer number (119832049).

Almost surely, 2^239664097 is an apocalyptic number.

It is an amenable number.

239664097 is a deficient number, since it is larger than the sum of its proper divisors (1).

239664097 is an equidigital number, since it uses as much as digits as its factorization.

239664097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 239664097 is about 15481.0883661324. The cubic root of 239664097 is about 621.1564411818.

The spelling of 239664097 in words is "two hundred thirty-nine million, six hundred sixty-four thousand, ninety-seven".