264449921 has 2 divisors, whose sum is σ = 264449922. Its totient is φ = 264449920.

The previous prime is 264449891. The next prime is 264449971. The reversal of 264449921 is 129944462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201072400 + 63377521 = 14180^2 + 7961^2 .

It is a cyclic number.

It is not a de Polignac number, because 264449921 - 2²⁶ = 197341057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264449971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132224960 + 132224961.

It is an arithmetic number, because the mean of its divisors is an integer number (132224961).

Almost surely, 2^264449921 is an apocalyptic number.

It is an amenable number.

264449921 is a deficient number, since it is larger than the sum of its proper divisors (1).

264449921 is an equidigital number, since it uses as much as digits as its factorization.

264449921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 264449921 is about 16261.9162769952. The cubic root of 264449921 is about 641.8710877184.

The spelling of 264449921 in words is "two hundred sixty-four million, four hundred forty-nine thousand, nine hundred twenty-one".