239519897 has 2 divisors, whose sum is σ = 239519898. Its totient is φ = 239519896.

The previous prime is 239519893. The next prime is 239519899. The reversal of 239519897 is 798915932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179131456 + 60388441 = 13384^2 + 7771^2 .

It is a cyclic number.

It is not a de Polignac number, because 239519897 - 2² = 239519893 is a prime.

Together with 239519899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (239519893) 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, 119759948 + 119759949.

It is an arithmetic number, because the mean of its divisors is an integer number (119759949).

Almost surely, 2^239519897 is an apocalyptic number.

239519897 is the 8273-rd centered heptagonal number.

It is an amenable number.

239519897 is a deficient number, since it is larger than the sum of its proper divisors (1).

239519897 is an equidigital number, since it uses as much as digits as its factorization.

239519897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 53.

The square root of 239519897 is about 15476.4303700821. The cubic root of 239519897 is about 621.0318379974.

The spelling of 239519897 in words is "two hundred thirty-nine million, five hundred nineteen thousand, eight hundred ninety-seven".