239719897 has 2 divisors, whose sum is σ = 239719898. Its totient is φ = 239719896.

The previous prime is 239719889. The next prime is 239719933. The reversal of 239719897 is 798917932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227074761 + 12645136 = 15069^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 239719897 - 2³ = 239719889 is a prime.

It is not a weakly prime, because it can be changed into another prime (239719867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119859948 + 119859949.

It is an arithmetic number, because the mean of its divisors is an integer number (119859949).

Almost surely, 2^239719897 is an apocalyptic number.

It is an amenable number.

239719897 is a deficient number, since it is larger than the sum of its proper divisors (1).

239719897 is an equidigital number, since it uses as much as digits as its factorization.

239719897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 239719897 is about 15482.8904601176. The cubic root of 239719897 is about 621.2046445357.

The spelling of 239719897 in words is "two hundred thirty-nine million, seven hundred nineteen thousand, eight hundred ninety-seven".