263669 has 6 divisors (see below), whose sum is σ = 306774. Its totient is φ = 225960.

The previous prime is 263657. The next prime is 263677. The reversal of 263669 is 966362.

It can be written as a sum of positive squares in only one way, i.e., 207025 + 56644 = 455^2 + 238^2 .

It is a de Polignac number, because none of the positive numbers 2^k-263669 is a prime.

It is a super-2 number, since 2×263669² = 139042683122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2642 + ... + 2739.

It is an arithmetic number, because the mean of its divisors is an integer number (51129).

2²⁶³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

263669 is a deficient number, since it is larger than the sum of its proper divisors (43105).

263669 is an equidigital number, since it uses as much as digits as its factorization.

263669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5388 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 263669 is about 513.4870981826. The cubic root of 263669 is about 64.1238649361.

The spelling of 263669 in words is "two hundred sixty-three thousand, six hundred sixty-nine".