1798943899 has 8 divisors (see below), whose sum is σ = 1808331392. Its totient is φ = 1789568640.

The previous prime is 1798943897. The next prime is 1798943911. The reversal of 1798943899 is 9983498971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1798943899 - 2¹ = 1798943897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1798943897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480037 + ... + 483769.

It is an arithmetic number, because the mean of its divisors is an integer number (226041424).

Almost surely, 2^1798943899 is an apocalyptic number.

1798943899 is a deficient number, since it is larger than the sum of its proper divisors (9387493).

1798943899 is a wasteful number, since it uses less digits than its factorization.

1798943899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117.

The product of its digits is 35271936, while the sum is 67.

The square root of 1798943899 is about 42413.9587753843. The cubic root of 1798943899 is about 1216.2024481415.

The spelling of 1798943899 in words is "one billion, seven hundred ninety-eight million, nine hundred forty-three thousand, eight hundred ninety-nine".