83718491 has 2 divisors, whose sum is σ = 83718492. Its totient is φ = 83718490.

The previous prime is 83718487. The next prime is 83718493. The reversal of 83718491 is 19481738.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83718491 - 2² = 83718487 is a prime.

Together with 83718493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83718493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41859245 + 41859246.

It is an arithmetic number, because the mean of its divisors is an integer number (41859246).

Almost surely, 2^83718491 is an apocalyptic number.

83718491 is a deficient number, since it is larger than the sum of its proper divisors (1).

83718491 is an equidigital number, since it uses as much as digits as its factorization.

83718491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 83718491 is about 9149.7809263392. The cubic root of 83718491 is about 437.4621307086.

The spelling of 83718491 in words is "eighty-three million, seven hundred eighteen thousand, four hundred ninety-one".