82644319 has 4 divisors (see below), whose sum is σ = 86994040. Its totient is φ = 78294600.

The previous prime is 82644311. The next prime is 82644343. The reversal of 82644319 is 91344628.

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 82644319 - 2³ = 82644311 is a prime.

It is a super-2 number, since 2×82644319² = 13660166925947522, 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 (82644311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174832 + ... + 2174869.

It is an arithmetic number, because the mean of its divisors is an integer number (21748510).

Almost surely, 2^82644319 is an apocalyptic number.

82644319 is a deficient number, since it is larger than the sum of its proper divisors (4349721).

82644319 is a wasteful number, since it uses less digits than its factorization.

82644319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349720.

The product of its digits is 41472, while the sum is 37.

The square root of 82644319 is about 9090.8920904386. The cubic root of 82644319 is about 435.5830803266.

The spelling of 82644319 in words is "eighty-two million, six hundred forty-four thousand, three hundred nineteen".