82919945 has 8 divisors (see below), whose sum is σ = 103830336. Its totient is φ = 63451696.

The previous prime is 82919927. The next prime is 82919959. The reversal of 82919945 is 54991928.

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

It is a cyclic number.

It is not a de Polignac number, because 82919945 - 2⁸ = 82919689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82919945.

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, 360407 + ... + 360636.

It is an arithmetic number, because the mean of its divisors is an integer number (12978792).

Almost surely, 2^82919945 is an apocalyptic number.

It is an amenable number.

82919945 is a deficient number, since it is larger than the sum of its proper divisors (20910391).

82919945 is a wasteful number, since it uses less digits than its factorization.

82919945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721071.

The product of its digits is 233280, while the sum is 47.

The square root of 82919945 is about 9106.0389302924. The cubic root of 82919945 is about 436.0667788324.

The spelling of 82919945 in words is "eighty-two million, nine hundred nineteen thousand, nine hundred forty-five".