249774973 has 4 divisors (see below), whose sum is σ = 285457120. Its totient is φ = 214092828.

The previous prime is 249774961. The next prime is 249774977. The reversal of 249774973 is 379477942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249774973 - 2⁹ = 249774461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249774973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249774977) 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, 17841063 + ... + 17841076.

It is an arithmetic number, because the mean of its divisors is an integer number (71364280).

Almost surely, 2^249774973 is an apocalyptic number.

It is an amenable number.

249774973 is a deficient number, since it is larger than the sum of its proper divisors (35682147).

249774973 is an equidigital number, since it uses as much as digits as its factorization.

249774973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35682146.

The product of its digits is 2667168, while the sum is 52.

The square root of 249774973 is about 15804.2707202832. The cubic root of 249774973 is about 629.7714573729.

The spelling of 249774973 in words is "two hundred forty-nine million, seven hundred seventy-four thousand, nine hundred seventy-three".