83391071 has 2 divisors, whose sum is σ = 83391072. Its totient is φ = 83391070.

The previous prime is 83391059. The next prime is 83391083. The reversal of 83391071 is 17019338.

It is a balanced prime because it is at equal distance from previous prime (83391059) and next prime (83391083).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83391071 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 (83391571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41695535 + 41695536.

It is an arithmetic number, because the mean of its divisors is an integer number (41695536).

Almost surely, 2^83391071 is an apocalyptic number.

83391071 is a deficient number, since it is larger than the sum of its proper divisors (1).

83391071 is an equidigital number, since it uses as much as digits as its factorization.

83391071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 83391071 is about 9131.8711664149. The cubic root of 83391071 is about 436.8910860749.

The spelling of 83391071 in words is "eighty-three million, three hundred ninety-one thousand, seventy-one".