263967493 has 2 divisors, whose sum is σ = 263967494. Its totient is φ = 263967492.

The previous prime is 263967467. The next prime is 263967523. The reversal of 263967493 is 394769362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263672644 + 294849 = 16238^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 263967493 - 2⁵ = 263967461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263967433) 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, 131983746 + 131983747.

It is an arithmetic number, because the mean of its divisors is an integer number (131983747).

Almost surely, 2^263967493 is an apocalyptic number.

It is an amenable number.

263967493 is a deficient number, since it is larger than the sum of its proper divisors (1).

263967493 is an equidigital number, since it uses as much as digits as its factorization.

263967493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 49.

The square root of 263967493 is about 16247.0764447023. The cubic root of 263967493 is about 641.4805347875.

The spelling of 263967493 in words is "two hundred sixty-three million, nine hundred sixty-seven thousand, four hundred ninety-three".