82139798 has 8 divisors (see below), whose sum is σ = 132687408. Its totient is φ = 37910664.

The previous prime is 82139747. The next prime is 82139821. The reversal of 82139798 is 89793128.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579586 + ... + 1579637.

It is an arithmetic number, because the mean of its divisors is an integer number (16585926).

Almost surely, 2^82139798 is an apocalyptic number.

82139798 is a deficient number, since it is larger than the sum of its proper divisors (50547610).

82139798 is a wasteful number, since it uses less digits than its factorization.

82139798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159238.

The product of its digits is 217728, while the sum is 47.

The square root of 82139798 is about 9063.1009042160. The cubic root of 82139798 is about 434.6948985776.

The spelling of 82139798 in words is "eighty-two million, one hundred thirty-nine thousand, seven hundred ninety-eight".