239873 has 2 divisors, whose sum is σ = 239874. Its totient is φ = 239872.

The previous prime is 239857. The next prime is 239879. The reversal of 239873 is 378932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237169 + 2704 = 487^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 239873 - 2⁴ = 239857 is a prime.

It is a super-2 number, since 2×239873² = 115078112258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (239879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119936 + 119937.

It is an arithmetic number, because the mean of its divisors is an integer number (119937).

2²³⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

239873 is a deficient number, since it is larger than the sum of its proper divisors (1).

239873 is an equidigital number, since it uses as much as digits as its factorization.

239873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 239873 is about 489.7683125724. The cubic root of 239873 is about 62.1336865592.

The spelling of 239873 in words is "two hundred thirty-nine thousand, eight hundred seventy-three".