83391321 has 8 divisors (see below), whose sum is σ = 119741440. Its totient is φ = 51317712.

The previous prime is 83391317. The next prime is 83391359. The reversal of 83391321 is 12319338.

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

It is not a de Polignac number, because 83391321 - 2² = 83391317 is a prime.

It is a super-2 number, since 2×83391321² = 13908224836250082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83391311) 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, 1069081 + ... + 1069158.

It is an arithmetic number, because the mean of its divisors is an integer number (14967680).

Almost surely, 2^83391321 is an apocalyptic number.

It is an amenable number.

83391321 is a deficient number, since it is larger than the sum of its proper divisors (36350119).

83391321 is a wasteful number, since it uses less digits than its factorization.

83391321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138255.

The product of its digits is 3888, while the sum is 30.

The square root of 83391321 is about 9131.8848547274. The cubic root of 83391321 is about 436.8915226630.

The spelling of 83391321 in words is "eighty-three million, three hundred ninety-one thousand, three hundred twenty-one".