83873809 has 4 divisors (see below), whose sum is σ = 88288240. Its totient is φ = 79459380.

The previous prime is 83873807. The next prime is 83873819. The reversal of 83873809 is 90837838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83873809 - 2¹ = 83873807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83873807) 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, 2207187 + ... + 2207224.

It is an arithmetic number, because the mean of its divisors is an integer number (22072060).

Almost surely, 2^83873809 is an apocalyptic number.

It is an amenable number.

83873809 is a deficient number, since it is larger than the sum of its proper divisors (4414431).

83873809 is a wasteful number, since it uses less digits than its factorization.

83873809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414430.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 83873809 is about 9158.2645190014. The cubic root of 83873809 is about 437.7324961801.

It can be divided in two parts, 838 and 73809, that added together give a palindrome (74647).

The spelling of 83873809 in words is "eighty-three million, eight hundred seventy-three thousand, eight hundred nine".