263670497 has 2 divisors, whose sum is σ = 263670498. Its totient is φ = 263670496.

The previous prime is 263670443. The next prime is 263670503. The reversal of 263670497 is 794076362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189090001 + 74580496 = 13751^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 263670497 - 2⁸ = 263670241 is a prime.

It is not a weakly prime, because it can be changed into another prime (263670427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131835248 + 131835249.

It is an arithmetic number, because the mean of its divisors is an integer number (131835249).

Almost surely, 2^263670497 is an apocalyptic number.

It is an amenable number.

263670497 is a deficient number, since it is larger than the sum of its proper divisors (1).

263670497 is an equidigital number, since it uses as much as digits as its factorization.

263670497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 263670497 is about 16237.9338895070. The cubic root of 263670497 is about 641.2398629189.

The spelling of 263670497 in words is "two hundred sixty-three million, six hundred seventy thousand, four hundred ninety-seven".