82719491 has 4 divisors (see below), whose sum is σ = 82761000. Its totient is φ = 82677984.

The previous prime is 82719463. The next prime is 82719493. The reversal of 82719491 is 19491728.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82719491 - 2¹⁴ = 82703107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82719493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17606 + ... + 21803.

It is an arithmetic number, because the mean of its divisors is an integer number (20690250).

Almost surely, 2^82719491 is an apocalyptic number.

82719491 is a deficient number, since it is larger than the sum of its proper divisors (41509).

82719491 is a wasteful number, since it uses less digits than its factorization.

82719491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41508.

The product of its digits is 36288, while the sum is 41.

The square root of 82719491 is about 9095.0256184356. The cubic root of 82719491 is about 435.7151068591.

The spelling of 82719491 in words is "eighty-two million, seven hundred nineteen thousand, four hundred ninety-one".