264664693 has 2 divisors, whose sum is σ = 264664694. Its totient is φ = 264664692.

The previous prime is 264664681. The next prime is 264664709. The reversal of 264664693 is 396466462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158306724 + 106357969 = 12582^2 + 10313^2 .

It is a cyclic number.

It is not a de Polignac number, because 264664693 - 2²¹ = 262567541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264664633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132332346 + 132332347.

It is an arithmetic number, because the mean of its divisors is an integer number (132332347).

Almost surely, 2^264664693 is an apocalyptic number.

It is an amenable number.

264664693 is a deficient number, since it is larger than the sum of its proper divisors (1).

264664693 is an equidigital number, since it uses as much as digits as its factorization.

264664693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 46.

The square root of 264664693 is about 16268.5184635848. The cubic root of 264664693 is about 642.0448050885.

The spelling of 264664693 in words is "two hundred sixty-four million, six hundred sixty-four thousand, six hundred ninety-three".