249961253 has 2 divisors, whose sum is σ = 249961254. Its totient is φ = 249961252.

The previous prime is 249961219. The next prime is 249961259. The reversal of 249961253 is 352169942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223263364 + 26697889 = 14942^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 249961253 - 2⁶ = 249961189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249961253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249961259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124980626 + 124980627.

It is an arithmetic number, because the mean of its divisors is an integer number (124980627).

Almost surely, 2^249961253 is an apocalyptic number.

It is an amenable number.

249961253 is a deficient number, since it is larger than the sum of its proper divisors (1).

249961253 is an equidigital number, since it uses as much as digits as its factorization.

249961253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 249961253 is about 15810.1629656370. The cubic root of 249961253 is about 629.9279778253.

The spelling of 249961253 in words is "two hundred forty-nine million, nine hundred sixty-one thousand, two hundred fifty-three".