249750247 has 4 divisors (see below), whose sum is σ = 264441456. Its totient is φ = 235059040.

The previous prime is 249750217. The next prime is 249750289. The reversal of 249750247 is 742057942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249750247 - 2⁷ = 249750119 is a prime.

It is a super-2 number, since 2×249750247² = 124750371753122018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249750217) 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 3 ways as a sum of consecutive naturals, for example, 7345579 + ... + 7345612.

It is an arithmetic number, because the mean of its divisors is an integer number (66110364).

Almost surely, 2^249750247 is an apocalyptic number.

249750247 is a deficient number, since it is larger than the sum of its proper divisors (14691209).

249750247 is a wasteful number, since it uses less digits than its factorization.

249750247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14691208.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 249750247 is about 15803.4884440113. The cubic root of 249750247 is about 629.7506756766.

The spelling of 249750247 in words is "two hundred forty-nine million, seven hundred fifty thousand, two hundred forty-seven".