249945973 has 2 divisors, whose sum is σ = 249945974. Its totient is φ = 249945972.

The previous prime is 249945947. The next prime is 249946003. The reversal of 249945973 is 379549942.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218507524 + 31438449 = 14782^2 + 5607^2 .

It is a cyclic number.

It is not a de Polignac number, because 249945973 - 2¹³ = 249937781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249945973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249945173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124972986 + 124972987.

It is an arithmetic number, because the mean of its divisors is an integer number (124972987).

Almost surely, 2^249945973 is an apocalyptic number.

It is an amenable number.

249945973 is a deficient number, since it is larger than the sum of its proper divisors (1).

249945973 is an equidigital number, since it uses as much as digits as its factorization.

249945973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The square root of 249945973 is about 15809.6797247762. The cubic root of 249945973 is about 629.9151418417.

The spelling of 249945973 in words is "two hundred forty-nine million, nine hundred forty-five thousand, nine hundred seventy-three".