249668133 has 48 divisors (see below), whose sum is σ = 397544448. Its totient is φ = 138441600.

The previous prime is 249668093. The next prime is 249668143. The reversal of 249668133 is 331866942.

It is not a de Polignac number, because 249668133 - 2¹⁰ = 249667109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249668143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 901191 + ... + 901467.

It is an arithmetic number, because the mean of its divisors is an integer number (8282176).

Almost surely, 2^249668133 is an apocalyptic number.

It is an amenable number.

249668133 is a deficient number, since it is larger than the sum of its proper divisors (147876315).

249668133 is a wasteful number, since it uses less digits than its factorization.

249668133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 495 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 249668133 is about 15800.8902597290. The cubic root of 249668133 is about 629.6816506994.

The spelling of 249668133 in words is "two hundred forty-nine million, six hundred sixty-eight thousand, one hundred thirty-three".