83456821 has 8 divisors (see below), whose sum is σ = 97179264. Its totient is φ = 70184400.

The previous prime is 83456803. The next prime is 83456833. The reversal of 83456821 is 12865438.

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 83456821 - 2¹¹ = 83454773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83456801) 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, 112105 + ... + 112846.

It is an arithmetic number, because the mean of its divisors is an integer number (12147408).

Almost surely, 2^83456821 is an apocalyptic number.

It is an amenable number.

83456821 is a deficient number, since it is larger than the sum of its proper divisors (13722443).

83456821 is a wasteful number, since it uses less digits than its factorization.

83456821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225011.

The product of its digits is 46080, while the sum is 37.

The square root of 83456821 is about 9135.4704859684. The cubic root of 83456821 is about 437.0058787110.

The spelling of 83456821 in words is "eighty-three million, four hundred fifty-six thousand, eight hundred twenty-one".