82689009 has 8 divisors (see below), whose sum is σ = 118732992. Its totient is φ = 50885520.

The previous prime is 82688989. The next prime is 82689011. The reversal of 82689009 is 90098628.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82689009 - 2¹² = 82684913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82689029) 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, 1060077 + ... + 1060154.

It is an arithmetic number, because the mean of its divisors is an integer number (14841624).

Almost surely, 2^82689009 is an apocalyptic number.

It is an amenable number.

82689009 is a deficient number, since it is larger than the sum of its proper divisors (36043983).

82689009 is a wasteful number, since it uses less digits than its factorization.

82689009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120247.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 82689009 is about 9093.3497128396. The cubic root of 82689009 is about 435.6615801773.

The spelling of 82689009 in words is "eighty-two million, six hundred eighty-nine thousand, nine".