253999263 has 8 divisors (see below), whose sum is σ = 387046528. Its totient is φ = 145142424.

The previous prime is 253999247. The next prime is 253999271. The reversal of 253999263 is 362999352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253999263 - 2⁴ = 253999247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253999283) 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 7 ways as a sum of consecutive naturals, for example, 6047581 + ... + 6047622.

It is an arithmetic number, because the mean of its divisors is an integer number (48380816).

Almost surely, 2^253999263 is an apocalyptic number.

253999263 is a deficient number, since it is larger than the sum of its proper divisors (133047265).

253999263 is a wasteful number, since it uses less digits than its factorization.

253999263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095213.

The product of its digits is 787320, while the sum is 48.

The square root of 253999263 is about 15937.3543287460. The cubic root of 253999263 is about 633.3019406108.

The spelling of 253999263 in words is "two hundred fifty-three million, nine hundred ninety-nine thousand, two hundred sixty-three".