249599249 has 2 divisors, whose sum is σ = 249599250. Its totient is φ = 249599248.

The previous prime is 249599239. The next prime is 249599261. The reversal of 249599249 is 942995942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162307600 + 87291649 = 12740^2 + 9343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249599249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 249599249.

It is not a weakly prime, because it can be changed into another prime (249599239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124799624 + 124799625.

It is an arithmetic number, because the mean of its divisors is an integer number (124799625).

Almost surely, 2^249599249 is an apocalyptic number.

It is an amenable number.

249599249 is a deficient number, since it is larger than the sum of its proper divisors (1).

249599249 is an equidigital number, since it uses as much as digits as its factorization.

249599249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 53.

The square root of 249599249 is about 15798.7103587603. The cubic root of 249599249 is about 629.6237351777.

The spelling of 249599249 in words is "two hundred forty-nine million, five hundred ninety-nine thousand, two hundred forty-nine".