83365891 has 4 divisors (see below), whose sum is σ = 95275312. Its totient is φ = 71456472.

The previous prime is 83365859. The next prime is 83365907. The reversal of 83365891 is 19856338.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19856338 = 2 ⋅9928169.

It is a cyclic number.

It is not a de Polignac number, because 83365891 - 2⁵ = 83365859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83365811) 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, 5954700 + ... + 5954713.

It is an arithmetic number, because the mean of its divisors is an integer number (23818828).

Almost surely, 2^83365891 is an apocalyptic number.

83365891 is a deficient number, since it is larger than the sum of its proper divisors (11909421).

83365891 is a wasteful number, since it uses less digits than its factorization.

83365891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11909420.

The product of its digits is 155520, while the sum is 43.

The square root of 83365891 is about 9130.4923744560. The cubic root of 83365891 is about 436.8471084449.

The spelling of 83365891 in words is "eighty-three million, three hundred sixty-five thousand, eight hundred ninety-one".