82743421 has 8 divisors (see below), whose sum is σ = 84188160. Its totient is φ = 81311328.

The previous prime is 82743413. The next prime is 82743469. The reversal of 82743421 is 12434728.

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

It is a cyclic number.

It is not a de Polignac number, because 82743421 - 2³ = 82743413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82743491) 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, 10545 + ... + 16633.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^82743421 is an apocalyptic number.

It is an amenable number.

82743421 is a deficient number, since it is larger than the sum of its proper divisors (1444739).

82743421 is a wasteful number, since it uses less digits than its factorization.

82743421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its digits is 10752, while the sum is 31.

The square root of 82743421 is about 9096.3410775982. The cubic root of 82743421 is about 435.7571189536.

The spelling of 82743421 in words is "eighty-two million, seven hundred forty-three thousand, four hundred twenty-one".