83399281 has 8 divisors (see below), whose sum is σ = 95731520. Its totient is φ = 71171568.

The previous prime is 83399257. The next prime is 83399293. The reversal of 83399281 is 18299338.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 83399281 - 2⁷ = 83399153 is a prime.

It is a super-2 number, since 2×83399281² = 13910880142633922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83399681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24411 + ... + 27616.

It is an arithmetic number, because the mean of its divisors is an integer number (11966440).

Almost surely, 2^83399281 is an apocalyptic number.

It is an amenable number.

83399281 is a deficient number, since it is larger than the sum of its proper divisors (12332239).

83399281 is a wasteful number, since it uses less digits than its factorization.

83399281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52263.

The product of its digits is 93312, while the sum is 43.

The square root of 83399281 is about 9132.3206798710. The cubic root of 83399281 is about 436.9054231738.

The spelling of 83399281 in words is "eighty-three million, three hundred ninety-nine thousand, two hundred eighty-one".