249903449 has 2 divisors, whose sum is σ = 249903450. Its totient is φ = 249903448.

The previous prime is 249903413. The next prime is 249903503. The reversal of 249903449 is 944309942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240250000 + 9653449 = 15500^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249903449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (249903649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124951724 + 124951725.

It is an arithmetic number, because the mean of its divisors is an integer number (124951725).

Almost surely, 2^249903449 is an apocalyptic number.

It is an amenable number.

249903449 is a deficient number, since it is larger than the sum of its proper divisors (1).

249903449 is an equidigital number, since it uses as much as digits as its factorization.

249903449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 249903449 is about 15808.3347952907. The cubic root of 249903449 is about 629.8794167469.

The spelling of 249903449 in words is "two hundred forty-nine million, nine hundred three thousand, four hundred forty-nine".