263913 has 16 divisors (see below), whose sum is σ = 388416. Its totient is φ = 158400.

The previous prime is 263911. The next prime is 263927. The reversal of 263913 is 319362.

It is not a de Polignac number, because 263913 - 2¹ = 263911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2563 + ... + 2663.

It is an arithmetic number, because the mean of its divisors is an integer number (24276).

2²⁶³⁹¹³ is an apocalyptic number.

It is an amenable number.

263913 is a deficient number, since it is larger than the sum of its proper divisors (124503).

263913 is a wasteful number, since it uses less digits than its factorization.

263913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

The product of its digits is 972, while the sum is 24.

The square root of 263913 is about 513.7246344103. The cubic root of 263913 is about 64.1436389700.

It can be divided in two parts, 263 and 913, that added together give a triangular number (1176 = T₄₈).

The spelling of 263913 in words is "two hundred sixty-three thousand, nine hundred thirteen".