4198990091 has 4 divisors (see below), whose sum is σ = 4209784800. Its totient is φ = 4188195384.

The previous prime is 4198990073. The next prime is 4198990099. The reversal of 4198990091 is 1900998914.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4198990091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4198990099) 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, 5396771 + ... + 5397548.

It is an arithmetic number, because the mean of its divisors is an integer number (1052446200).

Almost surely, 2^4198990091 is an apocalyptic number.

4198990091 is a deficient number, since it is larger than the sum of its proper divisors (10794709).

4198990091 is a wasteful number, since it uses less digits than its factorization.

4198990091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794708.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 4198990091 is about 64799.6148985470. The cubic root of 4198990091 is about 1613.2993169191.

The spelling of 4198990091 in words is "four billion, one hundred ninety-eight million, nine hundred ninety thousand, ninety-one".