83821393 has 8 divisors (see below), whose sum is σ = 85159296. Its totient is φ = 82488000.

The previous prime is 83821337. The next prime is 83821399. The reversal of 83821393 is 39312838.

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 83821393 - 2¹³ = 83813201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83821399) 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, 69193 + ... + 70393.

It is an arithmetic number, because the mean of its divisors is an integer number (10644912).

Almost surely, 2^83821393 is an apocalyptic number.

It is an amenable number.

83821393 is a deficient number, since it is larger than the sum of its proper divisors (1337903).

83821393 is a wasteful number, since it uses less digits than its factorization.

83821393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255.

The product of its digits is 31104, while the sum is 37.

The square root of 83821393 is about 9155.4023942151. The cubic root of 83821393 is about 437.6412918339.

The spelling of 83821393 in words is "eighty-three million, eight hundred twenty-one thousand, three hundred ninety-three".