263945 has 8 divisors (see below), whose sum is σ = 345600. Its totient is φ = 191920.

The previous prime is 263941. The next prime is 263951. The reversal of 263945 is 549362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 263945 - 2² = 263941 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6³ + 9 + 3¹¹ + 4⁴ + 5⁷ .

It is not an unprimeable number, because it can be changed into a prime (263941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345 + ... + 2454.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2²⁶³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

263945 is a deficient number, since it is larger than the sum of its proper divisors (81655).

263945 is a wasteful number, since it uses less digits than its factorization.

263945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its digits is 6480, while the sum is 29.

The square root of 263945 is about 513.7557785563. The cubic root of 263945 is about 64.1462313817.

The spelling of 263945 in words is "two hundred sixty-three thousand, nine hundred forty-five".