83170891 has 4 divisors (see below), whose sum is σ = 84342384. Its totient is φ = 81999400.

The previous prime is 83170873. The next prime is 83170937. The reversal of 83170891 is 19807138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83170891 - 2⁵ = 83170859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83170891.

It is not an unprimeable number, because it can be changed into a prime (83170831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585640 + ... + 585781.

It is an arithmetic number, because the mean of its divisors is an integer number (21085596).

Almost surely, 2^83170891 is an apocalyptic number.

83170891 is a deficient number, since it is larger than the sum of its proper divisors (1171493).

83170891 is a wasteful number, since it uses less digits than its factorization.

83170891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171492.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 83170891 is about 9119.8076185849. The cubic root of 83170891 is about 436.5062348572.

The spelling of 83170891 in words is "eighty-three million, one hundred seventy thousand, eight hundred ninety-one".