264691 has 4 divisors (see below), whose sum is σ = 302512. Its totient is φ = 226872.

The previous prime is 264659. The next prime is 264697. The reversal of 264691 is 196462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 264691 - 2⁵ = 264659 is a prime.

It is a super-2 number, since 2×264691² = 140122650962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (264697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18900 + ... + 18913.

It is an arithmetic number, because the mean of its divisors is an integer number (75628).

2²⁶⁴⁶⁹¹ is an apocalyptic number.

264691 is a deficient number, since it is larger than the sum of its proper divisors (37821).

264691 is an equidigital number, since it uses as much as digits as its factorization.

264691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37820.

The product of its digits is 2592, while the sum is 28.

The square root of 264691 is about 514.4812921769. The cubic root of 264691 is about 64.2066076926.

The spelling of 264691 in words is "two hundred sixty-four thousand, six hundred ninety-one".