82443919 has 4 divisors (see below), whose sum is σ = 82462240. Its totient is φ = 82425600.

The previous prime is 82443917. The next prime is 82443941. The reversal of 82443919 is 91934428.

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 82443919 - 2¹ = 82443917 is a prime.

It is a super-2 number, since 2×82443919² = 13593999560157122, 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 (82443913) 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, 2767 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (20615560).

Almost surely, 2^82443919 is an apocalyptic number.

82443919 is a deficient number, since it is larger than the sum of its proper divisors (18321).

82443919 is a wasteful number, since it uses less digits than its factorization.

82443919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18320.

The product of its digits is 62208, while the sum is 40.

The square root of 82443919 is about 9079.8633800295. The cubic root of 82443919 is about 435.2307209579.

The spelling of 82443919 in words is "eighty-two million, four hundred forty-three thousand, nine hundred nineteen".