83626021 has 2 divisors, whose sum is σ = 83626022. Its totient is φ = 83626020.

The previous prime is 83625961. The next prime is 83626027. The reversal of 83626021 is 12062638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 34975396 = 6975^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 83626021 - 2¹⁵ = 83593253 is a prime.

It is a super-2 number, since 2×83626021² = 13986622776584882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83626027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41813010 + 41813011.

It is an arithmetic number, because the mean of its divisors is an integer number (41813011).

Almost surely, 2^83626021 is an apocalyptic number.

It is an amenable number.

83626021 is a deficient number, since it is larger than the sum of its proper divisors (1).

83626021 is an equidigital number, since it uses as much as digits as its factorization.

83626021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 83626021 is about 9144.7264037805. The cubic root of 83626021 is about 437.3010072997.

Adding to 83626021 its reverse (12062638), we get a palindrome (95688659).

The spelling of 83626021 in words is "eighty-three million, six hundred twenty-six thousand, twenty-one".