264693761 has 2 divisors, whose sum is σ = 264693762. Its totient is φ = 264693760.

The previous prime is 264693739. The next prime is 264693763. The reversal of 264693761 is 167396462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206094736 + 58599025 = 14356^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 264693761 - 2¹⁴ = 264677377 is a prime.

It is a super-2 number, since 2×264693761² = 140125574224650242, which contains 22 as substring.

Together with 264693763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264693763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132346880 + 132346881.

It is an arithmetic number, because the mean of its divisors is an integer number (132346881).

Almost surely, 2^264693761 is an apocalyptic number.

It is an amenable number.

264693761 is a deficient number, since it is larger than the sum of its proper divisors (1).

264693761 is an equidigital number, since it uses as much as digits as its factorization.

264693761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 264693761 is about 16269.4118209602. The cubic root of 264693761 is about 642.0683093887.

The spelling of 264693761 in words is "two hundred sixty-four million, six hundred ninety-three thousand, seven hundred sixty-one".