249721094 has 16 divisors (see below), whose sum is σ = 432096768. Its totient is φ = 106022472.

The previous prime is 249721093. The next prime is 249721141. The reversal of 249721094 is 490127942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249721091) 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 7 ways as a sum of consecutive naturals, for example, 81854 + ... + 84849.

It is an arithmetic number, because the mean of its divisors is an integer number (27006048).

Almost surely, 2^249721094 is an apocalyptic number.

249721094 is a deficient number, since it is larger than the sum of its proper divisors (182375674).

249721094 is a wasteful number, since it uses less digits than its factorization.

249721094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166819.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 249721094 is about 15802.5660574478. The cubic root of 249721094 is about 629.7261714154.

The spelling of 249721094 in words is "two hundred forty-nine million, seven hundred twenty-one thousand, ninety-four".