82158289 has 4 divisors (see below), whose sum is σ = 83315520. Its totient is φ = 81001060.

The previous prime is 82158287. The next prime is 82158311. The reversal of 82158289 is 98285128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82158289 - 2¹ = 82158287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82158283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578509 + ... + 578650.

It is an arithmetic number, because the mean of its divisors is an integer number (20828880).

Almost surely, 2^82158289 is an apocalyptic number.

It is an amenable number.

82158289 is a deficient number, since it is larger than the sum of its proper divisors (1157231).

82158289 is a wasteful number, since it uses less digits than its factorization.

82158289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157230.

The product of its digits is 92160, while the sum is 43.

The square root of 82158289 is about 9064.1209722730. The cubic root of 82158289 is about 434.7275150862.

The spelling of 82158289 in words is "eighty-two million, one hundred fifty-eight thousand, two hundred eighty-nine".