83921719 has 8 divisors (see below), whose sum is σ = 96141728. Its totient is φ = 71759520.

The previous prime is 83921699. The next prime is 83921729. The reversal of 83921719 is 91712938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-83921719 is a prime.

It is a super-2 number, since 2×83921719² = 14085709839829922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83921729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11292 + ... + 17185.

It is an arithmetic number, because the mean of its divisors is an integer number (12017716).

Almost surely, 2^83921719 is an apocalyptic number.

83921719 is a deficient number, since it is larger than the sum of its proper divisors (12220009).

83921719 is a wasteful number, since it uses less digits than its factorization.

83921719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28905.

The product of its digits is 27216, while the sum is 40.

The square root of 83921719 is about 9160.8798158256. The cubic root of 83921719 is about 437.8158268101.

The spelling of 83921719 in words is "eighty-three million, nine hundred twenty-one thousand, seven hundred nineteen".