1691941198 has 16 divisors (see below), whose sum is σ = 2557963584. Its totient is φ = 839311200.

The previous prime is 1691941169. The next prime is 1691941231. The reversal of 1691941198 is 8911491961.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 138748 + ... + 150448.

It is an arithmetic number, because the mean of its divisors is an integer number (159872724).

Almost surely, 2^1691941198 is an apocalyptic number.

1691941198 is a deficient number, since it is larger than the sum of its proper divisors (866022386).

1691941198 is a wasteful number, since it uses less digits than its factorization.

1691941198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12267.

The product of its digits is 139968, while the sum is 49.

The square root of 1691941198 is about 41133.2128334270. The cubic root of 1691941198 is about 1191.5943129255.

The spelling of 1691941198 in words is "one billion, six hundred ninety-one million, nine hundred forty-one thousand, one hundred ninety-eight".