263494457 has 4 divisors (see below), whose sum is σ = 263542656. Its totient is φ = 263446260.

The previous prime is 263494447. The next prime is 263494471. The reversal of 263494457 is 754494362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263494457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263494447) 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 in 3 ways as a sum of consecutive naturals, for example, 14669 + ... + 27242.

It is an arithmetic number, because the mean of its divisors is an integer number (65885664).

Almost surely, 2^263494457 is an apocalyptic number.

It is an amenable number.

263494457 is a deficient number, since it is larger than the sum of its proper divisors (48199).

263494457 is an equidigital number, since it uses as much as digits as its factorization.

263494457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48198.

The product of its digits is 725760, while the sum is 44.

The square root of 263494457 is about 16232.5123440581. The cubic root of 263494457 is about 641.0971228975.

The spelling of 263494457 in words is "two hundred sixty-three million, four hundred ninety-four thousand, four hundred fifty-seven".