83656321 has 16 divisors (see below), whose sum is σ = 100062208. Its totient is φ = 68428800.

The previous prime is 83656319. The next prime is 83656357. The reversal of 83656321 is 12365638.

It is a 5-Lehmer number, since φ(83656321) divides (83656321-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 83656321 - 2¹ = 83656319 is a prime.

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

It is a deceptive number, since it divides R_83656320.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83656361) 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, 13201 + ... + 18481.

It is an arithmetic number, because the mean of its divisors is an integer number (6253888).

Almost surely, 2^83656321 is an apocalyptic number.

83656321 is the 5281-st octagonal number.

It is an amenable number.

83656321 is a deficient number, since it is larger than the sum of its proper divisors (16405887).

83656321 is a wasteful number, since it uses less digits than its factorization.

83656321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392.

The product of its digits is 25920, while the sum is 34.

The square root of 83656321 is about 9146.3829462799. The cubic root of 83656321 is about 437.3538163033.

The spelling of 83656321 in words is "eighty-three million, six hundred fifty-six thousand, three hundred twenty-one".