82011947 has 8 divisors (see below), whose sum is σ = 83687280. Its totient is φ = 80346240.

The previous prime is 82011911. The next prime is 82011959. The reversal of 82011947 is 74911028.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82011947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82011907) 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, 16247 + ... + 20687.

It is an arithmetic number, because the mean of its divisors is an integer number (10460910).

Almost surely, 2^82011947 is an apocalyptic number.

82011947 is a deficient number, since it is larger than the sum of its proper divisors (1675333).

82011947 is a wasteful number, since it uses less digits than its factorization.

82011947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 82011947 is about 9056.0447768328. The cubic root of 82011947 is about 434.4692465443.

The spelling of 82011947 in words is "eighty-two million, eleven thousand, nine hundred forty-seven".