83719109 has 2 divisors, whose sum is σ = 83719110. Its totient is φ = 83719108.

The previous prime is 83719099. The next prime is 83719157. The reversal of 83719109 is 90191738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 30283009 = 7310^2 + 5503^2 .

It is a cyclic number.

It is not a de Polignac number, because 83719109 - 2²⁴ = 66941893 is a prime.

It is a super-3 number, since 3×83719109³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83719199) 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, 41859554 + 41859555.

It is an arithmetic number, because the mean of its divisors is an integer number (41859555).

Almost surely, 2^83719109 is an apocalyptic number.

It is an amenable number.

83719109 is a deficient number, since it is larger than the sum of its proper divisors (1).

83719109 is an equidigital number, since it uses as much as digits as its factorization.

83719109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 83719109 is about 9149.8146975772. The cubic root of 83719109 is about 437.4632071372.

The spelling of 83719109 in words is "eighty-three million, seven hundred nineteen thousand, one hundred nine".