249998893 has 2 divisors, whose sum is σ = 249998894. Its totient is φ = 249998892.

The previous prime is 249998887. The next prime is 249998951. The reversal of 249998893 is 398899942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249071524 + 927369 = 15782^2 + 963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249998893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249998813) 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, 124999446 + 124999447.

It is an arithmetic number, because the mean of its divisors is an integer number (124999447).

Almost surely, 2^249998893 is an apocalyptic number.

It is an amenable number.

249998893 is a deficient number, since it is larger than the sum of its proper divisors (1).

249998893 is an equidigital number, since it uses as much as digits as its factorization.

249998893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 61.

The square root of 249998893 is about 15811.3532943894. The cubic root of 249998893 is about 629.9595951243.

The spelling of 249998893 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, eight hundred ninety-three".