82054639 has 4 divisors (see below), whose sum is σ = 85622256. Its totient is φ = 78487024.

The previous prime is 82054633. The next prime is 82054649. The reversal of 82054639 is 93645028.

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 82054639 - 2¹⁵ = 82021871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82054598 and 82054607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82054633) 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, 1783774 + ... + 1783819.

It is an arithmetic number, because the mean of its divisors is an integer number (21405564).

Almost surely, 2^82054639 is an apocalyptic number.

82054639 is a deficient number, since it is larger than the sum of its proper divisors (3567617).

82054639 is a wasteful number, since it uses less digits than its factorization.

82054639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567616.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 82054639 is about 9058.4015698135. The cubic root of 82054639 is about 434.5446223246.

The spelling of 82054639 in words is "eighty-two million, fifty-four thousand, six hundred thirty-nine".