82009745 has 8 divisors (see below), whose sum is σ = 98962560. Its totient is φ = 65240560.

The previous prime is 82009703. The next prime is 82009813. The reversal of 82009745 is 54790028.

It is a happy number.

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

It is not a de Polignac number, because 82009745 - 2¹⁰ = 82008721 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44921 + ... + 46710.

It is an arithmetic number, because the mean of its divisors is an integer number (12370320).

Almost surely, 2^82009745 is an apocalyptic number.

It is an amenable number.

82009745 is a deficient number, since it is larger than the sum of its proper divisors (16952815).

82009745 is a wasteful number, since it uses less digits than its factorization.

82009745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91815.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 82009745 is about 9055.9231997627. The cubic root of 82009745 is about 434.4653580464.

The spelling of 82009745 in words is "eighty-two million, nine thousand, seven hundred forty-five".