248749631 has 8 divisors (see below), whose sum is σ = 275124864. Its totient is φ = 223408800.

The previous prime is 248749603. The next prime is 248749637. The reversal of 248749631 is 136947842.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248749631 is a prime.

It is a super-2 number, since 2×248749631² = 123752757845272322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248749637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258095 + ... + 259056.

It is an arithmetic number, because the mean of its divisors is an integer number (34390608).

Almost surely, 2^248749631 is an apocalyptic number.

248749631 is a deficient number, since it is larger than the sum of its proper divisors (26375233).

248749631 is a wasteful number, since it uses less digits than its factorization.

248749631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517201.

The product of its digits is 290304, while the sum is 44.

The square root of 248749631 is about 15771.7985974967. The cubic root of 248749631 is about 628.9085249936.

The spelling of 248749631 in words is "two hundred forty-eight million, seven hundred forty-nine thousand, six hundred thirty-one".