264650621 has 2 divisors, whose sum is σ = 264650622. Its totient is φ = 264650620.

The previous prime is 264650609. The next prime is 264650647. The reversal of 264650621 is 126056462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251064025 + 13586596 = 15845^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 264650621 - 2¹⁰ = 264649597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264650521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132325310 + 132325311.

It is an arithmetic number, because the mean of its divisors is an integer number (132325311).

Almost surely, 2^264650621 is an apocalyptic number.

It is an amenable number.

264650621 is a deficient number, since it is larger than the sum of its proper divisors (1).

264650621 is an equidigital number, since it uses as much as digits as its factorization.

264650621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 264650621 is about 16268.0859660871. The cubic root of 264650621 is about 642.0334258920.

The spelling of 264650621 in words is "two hundred sixty-four million, six hundred fifty thousand, six hundred twenty-one".