249998453 has 2 divisors, whose sum is σ = 249998454. Its totient is φ = 249998452.

The previous prime is 249998449. The next prime is 249998459. The reversal of 249998453 is 354899942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161976529 + 88021924 = 12727^2 + 9382^2 .

It is a cyclic number.

It is not a de Polignac number, because 249998453 - 2² = 249998449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 249998395 and 249998404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249998459) 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, 124999226 + 124999227.

It is an arithmetic number, because the mean of its divisors is an integer number (124999227).

Almost surely, 2^249998453 is an apocalyptic number.

It is an amenable number.

249998453 is a deficient number, since it is larger than the sum of its proper divisors (1).

249998453 is an equidigital number, since it uses as much as digits as its factorization.

249998453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 249998453 is about 15811.3393803308. The cubic root of 249998453 is about 629.9592255462.

The spelling of 249998453 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, four hundred fifty-three".