263742489 has 12 divisors (see below), whose sum is σ = 383486272. Its totient is φ = 174663000.

The previous prime is 263742473. The next prime is 263742491. The reversal of 263742489 is 984247362.

263742489 is a `hidden beast` number, since 2 + 637 + 4 + 2 + 4 + 8 + 9 = 666.

263742489 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 263742489 - 2⁴ = 263742473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263742289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95677 + ... + 98394.

Almost surely, 2^263742489 is an apocalyptic number.

It is an amenable number.

263742489 is a deficient number, since it is larger than the sum of its proper divisors (119743783).

263742489 is a wasteful number, since it uses less digits than its factorization.

263742489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194228 (or 194225 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 263742489 is about 16240.1505227014. The cubic root of 263742489 is about 641.2982185052.

The spelling of 263742489 in words is "two hundred sixty-three million, seven hundred forty-two thousand, four hundred eighty-nine".