83809719 has 12 divisors (see below), whose sum is σ = 138352656. Its totient is φ = 47891232.

The previous prime is 83809639. The next prime is 83809721. The reversal of 83809719 is 91790838.

It is not a de Polignac number, because 83809719 - 2⁷ = 83809591 is a prime.

It is a super-2 number, since 2×83809719² = 14048137997717922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83809729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 665094 + ... + 665219.

It is an arithmetic number, because the mean of its divisors is an integer number (11529388).

Almost surely, 2^83809719 is an apocalyptic number.

83809719 is a deficient number, since it is larger than the sum of its proper divisors (54542937).

83809719 is a wasteful number, since it uses less digits than its factorization.

83809719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330326 (or 1330323 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 83809719 is about 9154.7648249423. The cubic root of 83809719 is about 437.6209737844.

The spelling of 83809719 in words is "eighty-three million, eight hundred nine thousand, seven hundred nineteen".