264787 has 2 divisors, whose sum is σ = 264788. Its totient is φ = 264786.

The previous prime is 264779. The next prime is 264791. The reversal of 264787 is 787462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264787 - 2³ = 264779 is a prime.

It is a super-2 number, since 2×264787² = 140224310738, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (264757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132393 + 132394.

It is an arithmetic number, because the mean of its divisors is an integer number (132394).

2²⁶⁴⁷⁸⁷ is an apocalyptic number.

264787 is a deficient number, since it is larger than the sum of its proper divisors (1).

264787 is an equidigital number, since it uses as much as digits as its factorization.

264787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 264787 is about 514.5745815720. The cubic root of 264787 is about 64.2143690562.

The spelling of 264787 in words is "two hundred sixty-four thousand, seven hundred eighty-seven".