249398911 has 2 divisors, whose sum is σ = 249398912. Its totient is φ = 249398910.

The previous prime is 249398899. The next prime is 249398951. The reversal of 249398911 is 119893942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249398911 - 2¹⁹ = 248874623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249398951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124699455 + 124699456.

It is an arithmetic number, because the mean of its divisors is an integer number (124699456).

Almost surely, 2^249398911 is an apocalyptic number.

249398911 is a deficient number, since it is larger than the sum of its proper divisors (1).

249398911 is an equidigital number, since it uses as much as digits as its factorization.

249398911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 249398911 is about 15792.3687583592. The cubic root of 249398911 is about 629.4552366438.

The spelling of 249398911 in words is "two hundred forty-nine million, three hundred ninety-eight thousand, nine hundred eleven".