249869089 has 2 divisors, whose sum is σ = 249869090. Its totient is φ = 249869088.

The previous prime is 249869027. The next prime is 249869101. The reversal of 249869089 is 980968942.

249869089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133056225 + 116812864 = 11535^2 + 10808^2 .

It is a cyclic number.

It is not a de Polignac number, because 249869089 - 2¹⁷ = 249738017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249869489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124934544 + 124934545.

It is an arithmetic number, because the mean of its divisors is an integer number (124934545).

Almost surely, 2^249869089 is an apocalyptic number.

It is an amenable number.

249869089 is a deficient number, since it is larger than the sum of its proper divisors (1).

249869089 is an equidigital number, since it uses as much as digits as its factorization.

249869089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 249869089 is about 15807.2479894509. The cubic root of 249869089 is about 629.8505473991.

The spelling of 249869089 in words is "two hundred forty-nine million, eight hundred sixty-nine thousand, eighty-nine".