263242749 has 48 divisors (see below), whose sum is σ = 447828480. Its totient is φ = 136009440.

The previous prime is 263242747. The next prime is 263242757. The reversal of 263242749 is 947242362.

It is a happy number.

It is not a de Polignac number, because 263242749 - 2¹ = 263242747 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263242741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 424962 + ... + 425580.

It is an arithmetic number, because the mean of its divisors is an integer number (9329760).

Almost surely, 2^263242749 is an apocalyptic number.

It is an amenable number.

263242749 is a deficient number, since it is larger than the sum of its proper divisors (184585731).

263242749 is a wasteful number, since it uses less digits than its factorization.

263242749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 903 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 263242749 is about 16224.7572863202. The cubic root of 263242749 is about 640.8929178610.

The spelling of 263242749 in words is "two hundred sixty-three million, two hundred forty-two thousand, seven hundred forty-nine".