82505089 has 8 divisors (see below), whose sum is σ = 84578912. Its totient is φ = 80438400.

The previous prime is 82505081. The next prime is 82505107. The reversal of 82505089 is 98050528.

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 82505089 - 2³ = 82505081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82505081) 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, 27514 + ... + 30364.

It is an arithmetic number, because the mean of its divisors is an integer number (10572364).

Almost surely, 2^82505089 is an apocalyptic number.

It is an amenable number.

82505089 is a deficient number, since it is larger than the sum of its proper divisors (2073823).

82505089 is a wasteful number, since it uses less digits than its factorization.

82505089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 82505089 is about 9083.2311982025. The cubic root of 82505089 is about 435.3383354503.

The spelling of 82505089 in words is "eighty-two million, five hundred five thousand, eighty-nine".