83867191 has 2 divisors, whose sum is σ = 83867192. Its totient is φ = 83867190.

The previous prime is 83867149. The next prime is 83867209. The reversal of 83867191 is 19176838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83867191 - 2¹⁵ = 83834423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83867491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41933595 + 41933596.

It is an arithmetic number, because the mean of its divisors is an integer number (41933596).

Almost surely, 2^83867191 is an apocalyptic number.

83867191 is a deficient number, since it is larger than the sum of its proper divisors (1).

83867191 is an equidigital number, since it uses as much as digits as its factorization.

83867191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 83867191 is about 9157.9031988769. The cubic root of 83867191 is about 437.7209828925.

The spelling of 83867191 in words is "eighty-three million, eight hundred sixty-seven thousand, one hundred ninety-one".