250166989 has 2 divisors, whose sum is σ = 250166990. Its totient is φ = 250166988.

The previous prime is 250166957. The next prime is 250167011. The reversal of 250166989 is 989661052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170511364 + 79655625 = 13058^2 + 8925^2 .

It is a cyclic number.

It is not a de Polignac number, because 250166989 - 2⁵ = 250166957 is a prime.

It is a super-2 number, since 2×250166989² = 125167044770652242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250166689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125083494 + 125083495.

It is an arithmetic number, because the mean of its divisors is an integer number (125083495).

Almost surely, 2^250166989 is an apocalyptic number.

It is an amenable number.

250166989 is a deficient number, since it is larger than the sum of its proper divisors (1).

250166989 is an equidigital number, since it uses as much as digits as its factorization.

250166989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 250166989 is about 15816.6680751668. The cubic root of 250166989 is about 630.1007557002.

The spelling of 250166989 in words is "two hundred fifty million, one hundred sixty-six thousand, nine hundred eighty-nine".