1798986853 has 4 divisors (see below), whose sum is σ = 1824324768. Its totient is φ = 1773648940.

The previous prime is 1798986817. The next prime is 1798986859. The reversal of 1798986853 is 3586898971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3586898971 = 1063 ⋅3374317.

It is a cyclic number.

It is not a de Polignac number, because 1798986853 - 2²⁵ = 1765432421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798986859) 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 in 3 ways as a sum of consecutive naturals, for example, 12668851 + ... + 12668992.

It is an arithmetic number, because the mean of its divisors is an integer number (456081192).

Almost surely, 2^1798986853 is an apocalyptic number.

It is an amenable number.

1798986853 is a deficient number, since it is larger than the sum of its proper divisors (25337915).

1798986853 is an equidigital number, since it uses as much as digits as its factorization.

1798986853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25337914.

The product of its digits is 26127360, while the sum is 64.

The square root of 1798986853 is about 42414.4651386765. The cubic root of 1798986853 is about 1216.2121279587.

The spelling of 1798986853 in words is "one billion, seven hundred ninety-eight million, nine hundred eighty-six thousand, eight hundred fifty-three".