249889663 has 2 divisors, whose sum is σ = 249889664. Its totient is φ = 249889662.

The previous prime is 249889649. The next prime is 249889771. The reversal of 249889663 is 366988942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249889663 - 2⁵ = 249889631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249880663) 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 as a sum of consecutive naturals, namely, 124944831 + 124944832.

It is an arithmetic number, because the mean of its divisors is an integer number (124944832).

Almost surely, 2^249889663 is an apocalyptic number.

249889663 is a deficient number, since it is larger than the sum of its proper divisors (1).

249889663 is an equidigital number, since it uses as much as digits as its factorization.

249889663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 55.

The square root of 249889663 is about 15807.8987534713. The cubic root of 249889663 is about 629.8678340372.

The spelling of 249889663 in words is "two hundred forty-nine million, eight hundred eighty-nine thousand, six hundred sixty-three".