82508989 has 4 divisors (see below), whose sum is σ = 82539100. Its totient is φ = 82478880.

The previous prime is 82508977. The next prime is 82508999. The reversal of 82508989 is 98980528.

It is a happy number.

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 9406489 + 73102500 = 3067^2 + 8550^2 .

It is a cyclic number.

It is not a de Polignac number, because 82508989 - 2⁷ = 82508861 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 (82508999) 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, 10482 + ... + 16579.

It is an arithmetic number, because the mean of its divisors is an integer number (20634775).

Almost surely, 2^82508989 is an apocalyptic number.

It is an amenable number.

82508989 is a deficient number, since it is larger than the sum of its proper divisors (30111).

82508989 is a wasteful number, since it uses less digits than its factorization.

82508989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30110.

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 82508989 is about 9083.4458769786. The cubic root of 82508989 is about 435.3451947959.

The spelling of 82508989 in words is "eighty-two million, five hundred eight thousand, nine hundred eighty-nine".