83409719 has 2 divisors, whose sum is σ = 83409720. Its totient is φ = 83409718.

The previous prime is 83409679. The next prime is 83409721. The reversal of 83409719 is 91790438.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83409719 is a prime.

It is a super-2 number, since 2×83409719² = 13914362447317922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 83409721, 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 (83409749) 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, 41704859 + 41704860.

It is an arithmetic number, because the mean of its divisors is an integer number (41704860).

Almost surely, 2^83409719 is an apocalyptic number.

83409719 is a deficient number, since it is larger than the sum of its proper divisors (1).

83409719 is an equidigital number, since it uses as much as digits as its factorization.

83409719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 83409719 is about 9132.8921487117. The cubic root of 83409719 is about 436.9236496641.

The spelling of 83409719 in words is "eighty-three million, four hundred nine thousand, seven hundred nineteen".