83821079 has 2 divisors, whose sum is σ = 83821080. Its totient is φ = 83821078.

The previous prime is 83821063. The next prime is 83821081. The reversal of 83821079 is 97012838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83821079 - 2⁴ = 83821063 is a prime.

Together with 83821081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83821279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41910539 + 41910540.

It is an arithmetic number, because the mean of its divisors is an integer number (41910540).

Almost surely, 2^83821079 is an apocalyptic number.

83821079 is a deficient number, since it is larger than the sum of its proper divisors (1).

83821079 is an equidigital number, since it uses as much as digits as its factorization.

83821079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 83821079 is about 9155.3852458539. The cubic root of 83821079 is about 437.6407453563.

The spelling of 83821079 in words is "eighty-three million, eight hundred twenty-one thousand, seventy-nine".