82369891 has 4 divisors (see below), whose sum is σ = 82796872. Its totient is φ = 81942912.

The previous prime is 82369873. The next prime is 82369907. The reversal of 82369891 is 19896328.

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 82369891 - 2⁹ = 82369379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82369801) 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, 213201 + ... + 213586.

It is an arithmetic number, because the mean of its divisors is an integer number (20699218).

Almost surely, 2^82369891 is an apocalyptic number.

82369891 is a deficient number, since it is larger than the sum of its proper divisors (426981).

82369891 is a wasteful number, since it uses less digits than its factorization.

82369891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426980.

The product of its digits is 186624, while the sum is 46.

The square root of 82369891 is about 9075.7859714738. The cubic root of 82369891 is about 435.1004145692.

The spelling of 82369891 in words is "eighty-two million, three hundred sixty-nine thousand, eight hundred ninety-one".