249668135 has 8 divisors (see below), whose sum is σ = 300492816. Its totient is φ = 199140480.

The previous prime is 249668093. The next prime is 249668143. The reversal of 249668135 is 531866942.

249668135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 249668135 - 2¹⁰ = 249667111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72401 + ... + 75770.

It is an arithmetic number, because the mean of its divisors is an integer number (37561602).

Almost surely, 2^249668135 is an apocalyptic number.

249668135 is a deficient number, since it is larger than the sum of its proper divisors (50824681).

249668135 is a wasteful number, since it uses less digits than its factorization.

249668135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148513.

The product of its digits is 311040, while the sum is 44.

The square root of 249668135 is about 15800.8903230166. The cubic root of 249668135 is about 629.6816523808.

The spelling of 249668135 in words is "two hundred forty-nine million, six hundred sixty-eight thousand, one hundred thirty-five".