3991141698 has 16 divisors (see below), whose sum is σ = 7992837120. Its totient is φ = 1328621616.

The previous prime is 3991141669. The next prime is 3991141709. The reversal of 3991141698 is 8961411993.

It is a self number, because there is not a number n which added to its sum of digits gives 3991141698.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434818 + ... + 443901.

It is an arithmetic number, because the mean of its divisors is an integer number (499552320).

Almost surely, 2^3991141698 is an apocalyptic number.

3991141698 is an abundant number, since it is smaller than the sum of its proper divisors (4001695422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3991141698 is a wasteful number, since it uses less digits than its factorization.

3991141698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879481.

The product of its digits is 419904, while the sum is 51.

The square root of 3991141698 is about 63175.4833618232. The cubic root of 3991141698 is about 1586.2283793916.

The spelling of 3991141698 in words is "three billion, nine hundred ninety-one million, one hundred forty-one thousand, six hundred ninety-eight".