83489991 has 8 divisors (see below), whose sum is σ = 119883120. Its totient is φ = 51378432.

The previous prime is 83489983. The next prime is 83489993. The reversal of 83489991 is 19998438.

It is a happy number.

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

It is not a de Polignac number, because 83489991 - 2³ = 83489983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83489993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070346 + ... + 1070423.

It is an arithmetic number, because the mean of its divisors is an integer number (14985390).

Almost surely, 2^83489991 is an apocalyptic number.

83489991 is a deficient number, since it is larger than the sum of its proper divisors (36393129).

83489991 is a wasteful number, since it uses less digits than its factorization.

83489991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140785.

The product of its digits is 559872, while the sum is 51.

The square root of 83489991 is about 9137.2857567223. The cubic root of 83489991 is about 437.0637671889.

The spelling of 83489991 in words is "eighty-three million, four hundred eighty-nine thousand, nine hundred ninety-one".