263315493 has 24 divisors (see below), whose sum is σ = 435322368. Its totient is φ = 150243552.

The previous prime is 263315473. The next prime is 263315539. The reversal of 263315493 is 394513362.

It is a happy number.

263315493 is a `hidden beast` number, since 2 + 633 + 15 + 4 + 9 + 3 = 666.

263315493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 263315493 - 2⁸ = 263315237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263315443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45996 + ... + 51402.

It is an arithmetic number, because the mean of its divisors is an integer number (18138432).

Almost surely, 2^263315493 is an apocalyptic number.

It is an amenable number.

263315493 is a deficient number, since it is larger than the sum of its proper divisors (172006875).

263315493 is a wasteful number, since it uses less digits than its factorization.

263315493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193 (or 6190 counting only the distinct ones).

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

The square root of 263315493 is about 16226.9988907376. The cubic root of 263315493 is about 640.9519468002.

Adding to 263315493 its sum of digits (36), we get a square (263315529 = 16227²).

The spelling of 263315493 in words is "two hundred sixty-three million, three hundred fifteen thousand, four hundred ninety-three".