83868591 has 8 divisors (see below), whose sum is σ = 111958704. Its totient is φ = 55845440.

The previous prime is 83868541. The next prime is 83868601. The reversal of 83868591 is 19586838.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83868591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83868591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83868541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13740 + ... + 18881.

It is an arithmetic number, because the mean of its divisors is an integer number (13994838).

Almost surely, 2^83868591 is an apocalyptic number.

83868591 is a deficient number, since it is larger than the sum of its proper divisors (28090113).

83868591 is a wasteful number, since it uses less digits than its factorization.

83868591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33481.

The product of its digits is 414720, while the sum is 48.

The square root of 83868591 is about 9157.9796352689. The cubic root of 83868591 is about 437.7234185131.

The spelling of 83868591 in words is "eighty-three million, eight hundred sixty-eight thousand, five hundred ninety-one".