249218493 has 8 divisors (see below), whose sum is σ = 337251168. Its totient is φ = 163665744.

The previous prime is 249218471. The next prime is 249218507. The reversal of 249218493 is 394812942.

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

It is not a de Polignac number, because 249218493 - 2⁶ = 249218429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249218413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619746 + ... + 620147.

It is an arithmetic number, because the mean of its divisors is an integer number (42156396).

Almost surely, 2^249218493 is an apocalyptic number.

It is an amenable number.

249218493 is a deficient number, since it is larger than the sum of its proper divisors (88032675).

249218493 is a wasteful number, since it uses less digits than its factorization.

249218493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239963.

The product of its digits is 124416, while the sum is 42.

The square root of 249218493 is about 15786.6555356098. The cubic root of 249218493 is about 629.3034150097.

The spelling of 249218493 in words is "two hundred forty-nine million, two hundred eighteen thousand, four hundred ninety-three".