239686393 has 2 divisors, whose sum is σ = 239686394. Its totient is φ = 239686392.

The previous prime is 239686367. The next prime is 239686397. The reversal of 239686393 is 393686932.

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., 212926464 + 26759929 = 14592^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 239686393 - 2⁵ = 239686361 is a prime.

It is not a weakly prime, because it can be changed into another prime (239686397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119843196 + 119843197.

It is an arithmetic number, because the mean of its divisors is an integer number (119843197).

Almost surely, 2^239686393 is an apocalyptic number.

It is an amenable number.

239686393 is a deficient number, since it is larger than the sum of its proper divisors (1).

239686393 is an equidigital number, since it uses as much as digits as its factorization.

239686393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 49.

The square root of 239686393 is about 15481.8084537951. The cubic root of 239686393 is about 621.1757026882.

The spelling of 239686393 in words is "two hundred thirty-nine million, six hundred eighty-six thousand, three hundred ninety-three".