250047989 has 2 divisors, whose sum is σ = 250047990. Its totient is φ = 250047988.

The previous prime is 250047983. The next prime is 250048021. The reversal of 250047989 is 989740052.

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., 149206225 + 100841764 = 12215^2 + 10042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250047989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250047983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125023994 + 125023995.

It is an arithmetic number, because the mean of its divisors is an integer number (125023995).

Almost surely, 2^250047989 is an apocalyptic number.

It is an amenable number.

250047989 is a deficient number, since it is larger than the sum of its proper divisors (1).

250047989 is an equidigital number, since it uses as much as digits as its factorization.

250047989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 250047989 is about 15812.9057734497. The cubic root of 250047989 is about 630.0008306028. Note that the first 3 decimals are identical.

The spelling of 250047989 in words is "two hundred fifty million, forty-seven thousand, nine hundred eighty-nine".