83990189 has 2 divisors, whose sum is σ = 83990190. Its totient is φ = 83990188.

The previous prime is 83990171. The next prime is 83990219. The reversal of 83990189 is 98109938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53904964 + 30085225 = 7342^2 + 5485^2 .

It is a cyclic number.

It is not a de Polignac number, because 83990189 - 2¹² = 83986093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83990789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41995094 + 41995095.

It is an arithmetic number, because the mean of its divisors is an integer number (41995095).

Almost surely, 2^83990189 is an apocalyptic number.

It is an amenable number.

83990189 is a deficient number, since it is larger than the sum of its proper divisors (1).

83990189 is an equidigital number, since it uses as much as digits as its factorization.

83990189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 83990189 is about 9164.6161403520. The cubic root of 83990189 is about 437.9348627447.

The spelling of 83990189 in words is "eighty-three million, nine hundred ninety thousand, one hundred eighty-nine".