83689191 has 12 divisors (see below), whose sum is σ = 122587920. Its totient is φ = 55006560.

The previous prime is 83689189. The next prime is 83689201. The reversal of 83689191 is 19198638.

It is not a de Polignac number, because 83689191 - 2¹ = 83689189 is a prime.

It is a super-6 number, since 6×83689191⁶ (a number of 49 digits) contains 666666 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83685191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64846 + ... + 66123.

It is an arithmetic number, because the mean of its divisors is an integer number (10215660).

Almost surely, 2^83689191 is an apocalyptic number.

83689191 is a deficient number, since it is larger than the sum of its proper divisors (38898729).

83689191 is a wasteful number, since it uses less digits than its factorization.

83689191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131046 (or 131043 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 83689191 is about 9148.1796549915. The cubic root of 83689191 is about 437.4110900688.

The spelling of 83689191 in words is "eighty-three million, six hundred eighty-nine thousand, one hundred ninety-one".