82889191 has 32 divisors (see below), whose sum is σ = 110937600. Its totient is φ = 59978880.

The previous prime is 82889189. The next prime is 82889197. The reversal of 82889191 is 19198828.

It is a cyclic number.

It is not a de Polignac number, because 82889191 - 2¹ = 82889189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82889197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77005 + ... + 78073.

It is an arithmetic number, because the mean of its divisors is an integer number (3466800).

Almost surely, 2^82889191 is an apocalyptic number.

82889191 is a deficient number, since it is larger than the sum of its proper divisors (28048409).

82889191 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (82889190) it forms an eRAP, since the sums of their prime factors are consecutive (1158 and 1159).

82889191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159.

The product of its digits is 82944, while the sum is 46.

The square root of 82889191 is about 9104.3501140938. The cubic root of 82889191 is about 436.0128615430.

The spelling of 82889191 in words is "eighty-two million, eight hundred eighty-nine thousand, one hundred ninety-one".