239349857 has 2 divisors, whose sum is σ = 239349858. Its totient is φ = 239349856.

The previous prime is 239349809. The next prime is 239349863. The reversal of 239349857 is 758943932.

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., 213043216 + 26306641 = 14596^2 + 5129^2 .

It is a cyclic number.

It is not a de Polignac number, because 239349857 - 2⁶ = 239349793 is a prime.

It is not a weakly prime, because it can be changed into another prime (239349157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119674928 + 119674929.

It is an arithmetic number, because the mean of its divisors is an integer number (119674929).

Almost surely, 2^239349857 is an apocalyptic number.

It is an amenable number.

239349857 is a deficient number, since it is larger than the sum of its proper divisors (1).

239349857 is an equidigital number, since it uses as much as digits as its factorization.

239349857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 239349857 is about 15470.9358799007. The cubic root of 239349857 is about 620.8848422027.

The spelling of 239349857 in words is "two hundred thirty-nine million, three hundred forty-nine thousand, eight hundred fifty-seven".