83316621 has 4 divisors (see below), whose sum is σ = 111088832. Its totient is φ = 55544412.

The previous prime is 83316613. The next prime is 83316631. The reversal of 83316621 is 12661338.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83316621 - 2³ = 83316613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83316631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13886101 + ... + 13886106.

It is an arithmetic number, because the mean of its divisors is an integer number (27772208).

Almost surely, 2^83316621 is an apocalyptic number.

It is an amenable number.

83316621 is a deficient number, since it is larger than the sum of its proper divisors (27772211).

83316621 is a wasteful number, since it uses less digits than its factorization.

83316621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27772210.

The product of its digits is 5184, while the sum is 30.

The square root of 83316621 is about 9127.7938736586. The cubic root of 83316621 is about 436.7610312801.

Adding to 83316621 its reverse (12661338), we get a palindrome (95977959).

The spelling of 83316621 in words is "eighty-three million, three hundred sixteen thousand, six hundred twenty-one".