82645473 has 8 divisors (see below), whose sum is σ = 113748736. Its totient is φ = 53319600.

The previous prime is 82645469. The next prime is 82645481. The reversal of 82645473 is 37454628.

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 82645473 - 2² = 82645469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82645373) 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 7 ways as a sum of consecutive naturals, for example, 444238 + ... + 444423.

It is an arithmetic number, because the mean of its divisors is an integer number (14218592).

Almost surely, 2^82645473 is an apocalyptic number.

It is an amenable number.

82645473 is a deficient number, since it is larger than the sum of its proper divisors (31103263).

82645473 is a wasteful number, since it uses less digits than its factorization.

82645473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888695.

The product of its digits is 161280, while the sum is 39.

The square root of 82645473 is about 9090.9555603358. The cubic root of 82645473 is about 435.5851077316.

The spelling of 82645473 in words is "eighty-two million, six hundred forty-five thousand, four hundred seventy-three".