264630881 has 2 divisors, whose sum is σ = 264630882. Its totient is φ = 264630880.

The previous prime is 264630791. The next prime is 264630889. The reversal of 264630881 is 188036462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264550225 + 80656 = 16265^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 264630881 - 2²² = 260436577 is a prime.

It is a super-2 number, since 2×264630881² = 140059006357672322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264630889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132315440 + 132315441.

It is an arithmetic number, because the mean of its divisors is an integer number (132315441).

Almost surely, 2^264630881 is an apocalyptic number.

It is an amenable number.

264630881 is a deficient number, since it is larger than the sum of its proper divisors (1).

264630881 is an equidigital number, since it uses as much as digits as its factorization.

264630881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 264630881 is about 16267.4792454148. The cubic root of 264630881 is about 642.0174626384.

The spelling of 264630881 in words is "two hundred sixty-four million, six hundred thirty thousand, eight hundred eighty-one".