249903413 has 2 divisors, whose sum is σ = 249903414. Its totient is φ = 249903412.

The previous prime is 249903403. The next prime is 249903449. The reversal of 249903413 is 314309942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240312004 + 9591409 = 15502^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 249903413 - 2¹⁸ = 249641269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249903403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124951706 + 124951707.

It is an arithmetic number, because the mean of its divisors is an integer number (124951707).

Almost surely, 2^249903413 is an apocalyptic number.

It is an amenable number.

249903413 is a deficient number, since it is larger than the sum of its proper divisors (1).

249903413 is an equidigital number, since it uses as much as digits as its factorization.

249903413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 249903413 is about 15808.3336566508. Note that the first 3 decimals coincide. The cubic root of 249903413 is about 629.8793865010.

The spelling of 249903413 in words is "two hundred forty-nine million, nine hundred three thousand, four hundred thirteen".