249888449 has 2 divisors, whose sum is σ = 249888450. Its totient is φ = 249888448.

The previous prime is 249888439. The next prime is 249888461. The reversal of 249888449 is 944888942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181710400 + 68178049 = 13480^2 + 8257^2 .

It is a cyclic number.

It is not a de Polignac number, because 249888449 - 2¹⁶ = 249822913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 249888394 and 249888403.

It is not a weakly prime, because it can be changed into another prime (249888409) 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, 124944224 + 124944225.

It is an arithmetic number, because the mean of its divisors is an integer number (124944225).

Almost surely, 2^249888449 is an apocalyptic number.

It is an amenable number.

249888449 is a deficient number, since it is larger than the sum of its proper divisors (1).

249888449 is an equidigital number, since it uses as much as digits as its factorization.

249888449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 56.

The square root of 249888449 is about 15807.8603548994. The cubic root of 249888449 is about 629.8668140393.

The spelling of 249888449 in words is "two hundred forty-nine million, eight hundred eighty-eight thousand, four hundred forty-nine".