263964499 has 2 divisors, whose sum is σ = 263964500. Its totient is φ = 263964498.

The previous prime is 263964479. The next prime is 263964521. The reversal of 263964499 is 994469362.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263964499 is a prime.

It is not a weakly prime, because it can be changed into another prime (263964419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131982249 + 131982250.

It is an arithmetic number, because the mean of its divisors is an integer number (131982250).

Almost surely, 2^263964499 is an apocalyptic number.

263964499 is a deficient number, since it is larger than the sum of its proper divisors (1).

263964499 is an equidigital number, since it uses as much as digits as its factorization.

263964499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 52.

The square root of 263964499 is about 16246.9843047872. The cubic root of 263964499 is about 641.4781094889.

The spelling of 263964499 in words is "two hundred sixty-three million, nine hundred sixty-four thousand, four hundred ninety-nine".