1798853991 has 16 divisors (see below), whose sum is σ = 2630081280. Its totient is φ = 1084561920.

The previous prime is 1798853981. The next prime is 1798854011. The reversal of 1798853991 is 1993588971.

It is not a de Polignac number, because 1798853991 - 2⁹ = 1798853479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798853921) 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 15 ways as a sum of consecutive naturals, for example, 134851 + ... + 147588.

It is an arithmetic number, because the mean of its divisors is an integer number (164380080).

Almost surely, 2^1798853991 is an apocalyptic number.

1798853991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1798853991 is a deficient number, since it is larger than the sum of its proper divisors (831227289).

1798853991 is a wasteful number, since it uses less digits than its factorization.

1798853991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282646.

The product of its digits is 4898880, while the sum is 60.

The square root of 1798853991 is about 42412.8988752243. The cubic root of 1798853991 is about 1216.1821865960.

The spelling of 1798853991 in words is "one billion, seven hundred ninety-eight million, eight hundred fifty-three thousand, nine hundred ninety-one".