249975853 has 4 divisors (see below), whose sum is σ = 258595740. Its totient is φ = 241355968.

The previous prime is 249975851. The next prime is 249975889. The reversal of 249975853 is 358579942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196364169 + 53611684 = 14013^2 + 7322^2 .

It is a cyclic number.

It is not a de Polignac number, because 249975853 - 2¹ = 249975851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249975853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249975851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4309900 + ... + 4309957.

It is an arithmetic number, because the mean of its divisors is an integer number (64648935).

Almost surely, 2^249975853 is an apocalyptic number.

It is an amenable number.

249975853 is a deficient number, since it is larger than the sum of its proper divisors (8619887).

249975853 is an equidigital number, since it uses as much as digits as its factorization.

249975853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8619886.

The product of its digits is 2721600, while the sum is 52.

The square root of 249975853 is about 15810.6246872159. The cubic root of 249975853 is about 629.9402420853.

The spelling of 249975853 in words is "two hundred forty-nine million, nine hundred seventy-five thousand, eight hundred fifty-three".