264787493 has 2 divisors, whose sum is σ = 264787494. Its totient is φ = 264787492.

The previous prime is 264787403. The next prime is 264787499. The reversal of 264787493 is 394787462.

264787493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154579489 + 110208004 = 12433^2 + 10498^2 .

It is a cyclic number.

It is not a de Polignac number, because 264787493 - 2¹⁶ = 264721957 is a prime.

It is a super-2 number, since 2×264787493² = 140224832898450098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264787499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132393746 + 132393747.

It is an arithmetic number, because the mean of its divisors is an integer number (132393747).

Almost surely, 2^264787493 is an apocalyptic number.

It is an amenable number.

264787493 is a deficient number, since it is larger than the sum of its proper divisors (1).

264787493 is an equidigital number, since it uses as much as digits as its factorization.

264787493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 264787493 is about 16272.2921864131. The cubic root of 264787493 is about 642.1440890924.

The spelling of 264787493 in words is "two hundred sixty-four million, seven hundred eighty-seven thousand, four hundred ninety-three".