83973891 has 8 divisors (see below), whose sum is σ = 112068880. Its totient is φ = 55930752.

The previous prime is 83973853. The next prime is 83973907. The reversal of 83973891 is 19837938.

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

It is not a de Polignac number, because 83973891 - 2¹⁹ = 83449603 is a prime.

It is a super-2 number, since 2×83973891² = 14103228739359762, which contains 22 as substring.

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 83973891.

It is not an unprimeable number, because it can be changed into a prime (83972891) 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, 9010 + ... + 15783.

It is an arithmetic number, because the mean of its divisors is an integer number (14008610).

Almost surely, 2^83973891 is an apocalyptic number.

83973891 is a deficient number, since it is larger than the sum of its proper divisors (28094989).

83973891 is a wasteful number, since it uses less digits than its factorization.

83973891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25925.

The product of its digits is 326592, while the sum is 48.

The square root of 83973891 is about 9163.7269164898. The cubic root of 83973891 is about 437.9065343403.

The spelling of 83973891 in words is "eighty-three million, nine hundred seventy-three thousand, eight hundred ninety-one".