83278121 has 16 divisors (see below), whose sum is σ = 95823360. Its totient is φ = 71850240.

The previous prime is 83278109. The next prime is 83278123. The reversal of 83278121 is 12187238.

It is a cyclic number.

It is not a de Polignac number, because 83278121 - 2¹⁰ = 83277097 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83278123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5855 + ... + 14171.

It is an arithmetic number, because the mean of its divisors is an integer number (5988960).

Almost surely, 2^83278121 is an apocalyptic number.

It is an amenable number.

83278121 is a deficient number, since it is larger than the sum of its proper divisors (12545239).

83278121 is a wasteful number, since it uses less digits than its factorization.

83278121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384.

The product of its digits is 5376, while the sum is 32.

The square root of 83278121 is about 9125.6846866413. The cubic root of 83278121 is about 436.6937462245.

The spelling of 83278121 in words is "eighty-three million, two hundred seventy-eight thousand, one hundred twenty-one".