239646493 has 2 divisors, whose sum is σ = 239646494. Its totient is φ = 239646492.

The previous prime is 239646479. The next prime is 239646497. The reversal of 239646493 is 394646932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239073444 + 573049 = 15462^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 239646493 - 2¹⁷ = 239515421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239646497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119823246 + 119823247.

It is an arithmetic number, because the mean of its divisors is an integer number (119823247).

Almost surely, 2^239646493 is an apocalyptic number.

It is an amenable number.

239646493 is a deficient number, since it is larger than the sum of its proper divisors (1).

239646493 is an equidigital number, since it uses as much as digits as its factorization.

239646493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 239646493 is about 15480.5197910148. The cubic root of 239646493 is about 621.1412322486.

The spelling of 239646493 in words is "two hundred thirty-nine million, six hundred forty-six thousand, four hundred ninety-three".