83121443 has 2 divisors, whose sum is σ = 83121444. Its totient is φ = 83121442.

The previous prime is 83121407. The next prime is 83121457. The reversal of 83121443 is 34412138.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83121443 - 2⁸ = 83121187 is a prime.

It is not a weakly prime, because it can be changed into another prime (83151443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41560721 + 41560722.

It is an arithmetic number, because the mean of its divisors is an integer number (41560722).

Almost surely, 2^83121443 is an apocalyptic number.

83121443 is a deficient number, since it is larger than the sum of its proper divisors (1).

83121443 is an equidigital number, since it uses as much as digits as its factorization.

83121443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 83121443 is about 9117.0961934160. The cubic root of 83121443 is about 436.4197116397.

The spelling of 83121443 in words is "eighty-three million, one hundred twenty-one thousand, four hundred forty-three".