249999993 has 16 divisors (see below), whose sum is σ = 377360640. Its totient is φ = 163521072.

The previous prime is 249999991. The next prime is 250000013. The reversal of 249999993 is 399999942.

It is not a de Polignac number, because 249999993 - 2¹ = 249999991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249999993.

It is not an unprimeable number, because it can be changed into a prime (249999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85921 + ... + 88782.

It is an arithmetic number, because the mean of its divisors is an integer number (23585040).

Almost surely, 2^249999993 is an apocalyptic number.

It is an amenable number.

249999993 is a deficient number, since it is larger than the sum of its proper divisors (127360647).

249999993 is a wasteful number, since it uses less digits than its factorization.

249999993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174765 (or 174759 counting only the distinct ones).

The product of its digits is 12754584, while the sum is 63.

The square root of 249999993 is about 15811.3880794825. The cubic root of 249999993 is about 629.9605190678.

The spelling of 249999993 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".