249733987 has 2 divisors, whose sum is σ = 249733988. Its totient is φ = 249733986.

The previous prime is 249733921. The next prime is 249734011. The reversal of 249733987 is 789337942.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249733987 is a prime.

It is not a weakly prime, because it can be changed into another prime (249733907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124866993 + 124866994.

It is an arithmetic number, because the mean of its divisors is an integer number (124866994).

Almost surely, 2^249733987 is an apocalyptic number.

249733987 is a deficient number, since it is larger than the sum of its proper divisors (1).

249733987 is an equidigital number, since it uses as much as digits as its factorization.

249733987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The square root of 249733987 is about 15802.9739922585. The cubic root of 249733987 is about 629.7370087322.

The spelling of 249733987 in words is "two hundred forty-nine million, seven hundred thirty-three thousand, nine hundred eighty-seven".