263153493 has 12 divisors (see below), whose sum is σ = 381457440. Its totient is φ = 174814056.

The previous prime is 263153479. The next prime is 263153521. The reversal of 263153493 is 394351362.

It is a happy number.

263153493 is a `hidden beast` number, since 2 + 6 + 31 + 534 + 93 = 666.

It is not a de Polignac number, because 263153493 - 2⁵ = 263153461 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263153413) 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 in 11 ways as a sum of consecutive naturals, for example, 49113 + ... + 54206.

It is an arithmetic number, because the mean of its divisors is an integer number (31788120).

Almost surely, 2^263153493 is an apocalyptic number.

It is an amenable number.

263153493 is a deficient number, since it is larger than the sum of its proper divisors (118303947).

263153493 is a wasteful number, since it uses less digits than its factorization.

263153493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103608 (or 103605 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 263153493 is about 16222.0064418678. The cubic root of 263153493 is about 640.8204752139.

The spelling of 263153493 in words is "two hundred sixty-three million, one hundred fifty-three thousand, four hundred ninety-three".