83008621 has 2 divisors, whose sum is σ = 83008622. Its totient is φ = 83008620.

The previous prime is 83008613. The next prime is 83008631. The reversal of 83008621 is 12680038.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 19980900 = 7939^2 + 4470^2 .

It is a cyclic number.

It is not a de Polignac number, because 83008621 - 2³ = 83008613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83008621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83008631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41504310 + 41504311.

It is an arithmetic number, because the mean of its divisors is an integer number (41504311).

Almost surely, 2^83008621 is an apocalyptic number.

It is an amenable number.

83008621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83008621 is an equidigital number, since it uses as much as digits as its factorization.

83008621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 83008621 is about 9110.9067057017. The cubic root of 83008621 is about 436.2221691974. Note that the first 3 decimals are identical.

Adding to 83008621 its reverse (12680038), we get a palindrome (95688659).

The spelling of 83008621 in words is "eighty-three million, eight thousand, six hundred twenty-one".