263387 has 2 divisors, whose sum is σ = 263388. Its totient is φ = 263386.

The previous prime is 263383. The next prime is 263399. The reversal of 263387 is 783362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263387 - 2² = 263383 is a prime.

It is not a weakly prime, because it can be changed into another prime (263383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131693 + 131694.

It is an arithmetic number, because the mean of its divisors is an integer number (131694).

2²⁶³³⁸⁷ is an apocalyptic number.

263387 is a deficient number, since it is larger than the sum of its proper divisors (1).

263387 is an equidigital number, since it uses as much as digits as its factorization.

263387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 263387 is about 513.2124316499. The cubic root of 263387 is about 64.1009961367.

The spelling of 263387 in words is "two hundred sixty-three thousand, three hundred eighty-seven".