82118971 has 8 divisors (see below), whose sum is σ = 89733888. Its totient is φ = 74529000.

The previous prime is 82118963. The next prime is 82118983. The reversal of 82118971 is 17981128.

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 82118971 - 2³ = 82118963 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 82118971.

It is not an unprimeable number, because it can be changed into a prime (82118371) 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, 1026 + ... + 12856.

It is an arithmetic number, because the mean of its divisors is an integer number (11216736).

Almost surely, 2^82118971 is an apocalyptic number.

82118971 is a deficient number, since it is larger than the sum of its proper divisors (7614917).

82118971 is a wasteful number, since it uses less digits than its factorization.

82118971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12473.

The product of its digits is 8064, while the sum is 37.

The square root of 82118971 is about 9061.9518316972. The cubic root of 82118971 is about 434.6581557068.

The spelling of 82118971 in words is "eighty-two million, one hundred eighteen thousand, nine hundred seventy-one".