82589639 has 12 divisors (see below), whose sum is σ = 91000728. Its totient is φ = 74899440.

The previous prime is 82589603. The next prime is 82589641. The reversal of 82589639 is 93698528.

It is not a de Polignac number, because 82589639 - 2¹² = 82585543 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 (82589939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93092 + ... + 93974.

It is an arithmetic number, because the mean of its divisors is an integer number (7583394).

Almost surely, 2^82589639 is an apocalyptic number.

82589639 is a deficient number, since it is larger than the sum of its proper divisors (8411089).

82589639 is a wasteful number, since it uses less digits than its factorization.

82589639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1667 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 82589639 is about 9087.8841872022. The cubic root of 82589639 is about 435.4869941189.

Subtracting 82589639 from its reverse (93698528), we obtain a square (11108889 = 3333²).

The spelling of 82589639 in words is "eighty-two million, five hundred eighty-nine thousand, six hundred thirty-nine".