83280921 has 16 divisors (see below), whose sum is σ = 113201088. Its totient is φ = 54446400.

The previous prime is 83280917. The next prime is 83280937. The reversal of 83280921 is 12908238.

It is not a de Polignac number, because 83280921 - 2² = 83280917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83280991) 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 15 ways as a sum of consecutive naturals, for example, 104095 + ... + 104891.

It is an arithmetic number, because the mean of its divisors is an integer number (7075068).

Almost surely, 2^83280921 is an apocalyptic number.

It is an amenable number.

83280921 is a deficient number, since it is larger than the sum of its proper divisors (29920167).

83280921 is a wasteful number, since it uses less digits than its factorization.

83280921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 83280921 is about 9125.8380984981. The cubic root of 83280921 is about 436.6986403822.

The spelling of 83280921 in words is "eighty-three million, two hundred eighty thousand, nine hundred twenty-one".