82491729 has 8 divisors (see below), whose sum is σ = 110273280. Its totient is φ = 54852336.

The previous prime is 82491719. The next prime is 82491733. The reversal of 82491729 is 92719428.

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

It is not a de Polignac number, because 82491729 - 2¹¹ = 82489681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82491719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34177 + ... + 36510.

It is an arithmetic number, because the mean of its divisors is an integer number (13784160).

Almost surely, 2^82491729 is an apocalyptic number.

It is an amenable number.

82491729 is a deficient number, since it is larger than the sum of its proper divisors (27781551).

82491729 is a wasteful number, since it uses less digits than its factorization.

82491729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71079.

The product of its digits is 72576, while the sum is 42.

The square root of 82491729 is about 9082.4957473153. The cubic root of 82491729 is about 435.3148361560.

The spelling of 82491729 in words is "eighty-two million, four hundred ninety-one thousand, seven hundred twenty-nine".