82497889 has 4 divisors (see below), whose sum is σ = 87350724. Its totient is φ = 77645056.

The previous prime is 82497881. The next prime is 82497893. The reversal of 82497889 is 98879428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55249489 + 27248400 = 7433^2 + 5220^2 .

It is a cyclic number.

It is not a de Polignac number, because 82497889 - 2³ = 82497881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82497881) 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, 2426392 + ... + 2426425.

It is an arithmetic number, because the mean of its divisors is an integer number (21837681).

Almost surely, 2^82497889 is an apocalyptic number.

It is an amenable number.

82497889 is a deficient number, since it is larger than the sum of its proper divisors (4852835).

82497889 is a wasteful number, since it uses less digits than its factorization.

82497889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852834.

The product of its digits is 2322432, while the sum is 55.

The square root of 82497889 is about 9082.8348548237. The cubic root of 82497889 is about 435.3256714752.

The spelling of 82497889 in words is "eighty-two million, four hundred ninety-seven thousand, eight hundred eighty-nine".