249398951 has 2 divisors, whose sum is σ = 249398952. Its totient is φ = 249398950.

The previous prime is 249398911. The next prime is 249398953. The reversal of 249398951 is 159893942.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249398951 - 2¹⁰ = 249397927 is a prime.

It is a Sophie Germain prime.

Together with 249398953, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249398951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249398953) 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, 124699475 + 124699476.

It is an arithmetic number, because the mean of its divisors is an integer number (124699476).

Almost surely, 2^249398951 is an apocalyptic number.

249398951 is a deficient number, since it is larger than the sum of its proper divisors (1).

249398951 is an equidigital number, since it uses as much as digits as its factorization.

249398951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 249398951 is about 15792.3700247936. The cubic root of 249398951 is about 629.4552702957.

The spelling of 249398951 in words is "two hundred forty-nine million, three hundred ninety-eight thousand, nine hundred fifty-one".