82813643 has 8 divisors (see below), whose sum is σ = 90463296. Its totient is φ = 75184200.

The previous prime is 82813631. The next prime is 82813667. The reversal of 82813643 is 34631828.

It is a happy number.

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 82813643 - 2⁸ = 82813387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82813603) 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, 4280 + ... + 13562.

It is an arithmetic number, because the mean of its divisors is an integer number (11307912).

Almost surely, 2^82813643 is an apocalyptic number.

82813643 is a deficient number, since it is larger than the sum of its proper divisors (7649653).

82813643 is a wasteful number, since it uses less digits than its factorization.

82813643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105.

The product of its digits is 27648, while the sum is 35.

The square root of 82813643 is about 9100.2001626338. The cubic root of 82813643 is about 435.8803556764.

The spelling of 82813643 in words is "eighty-two million, eight hundred thirteen thousand, six hundred forty-three".