263239 has 2 divisors, whose sum is σ = 263240. Its totient is φ = 263238.

The previous prime is 263227. The next prime is 263257. The reversal of 263239 is 932362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263239 - 2⁷ = 263111 is a prime.

It is a super-2 number, since 2×263239² = 138589542242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131619 + 131620.

It is an arithmetic number, because the mean of its divisors is an integer number (131620).

2²⁶³²³⁹ is an apocalyptic number.

263239 is a deficient number, since it is larger than the sum of its proper divisors (1).

263239 is an equidigital number, since it uses as much as digits as its factorization.

263239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 263239 is about 513.0682215846. The cubic root of 263239 is about 64.0889875398.

The spelling of 263239 in words is "two hundred sixty-three thousand, two hundred thirty-nine".