82471979 has 8 divisors (see below), whose sum is σ = 84522240. Its totient is φ = 80427816.

The previous prime is 82471957. The next prime is 82471999. The reversal of 82471979 is 97917428.

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 82471979 - 2¹² = 82467883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82471999) 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, 38474 + ... + 40560.

It is an arithmetic number, because the mean of its divisors is an integer number (10565280).

Almost surely, 2^82471979 is an apocalyptic number.

82471979 is a deficient number, since it is larger than the sum of its proper divisors (2050261).

82471979 is a wasteful number, since it uses less digits than its factorization.

82471979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049.

The product of its digits is 254016, while the sum is 47.

The square root of 82471979 is about 9081.4084260097. The cubic root of 82471979 is about 435.2800926557.

The spelling of 82471979 in words is "eighty-two million, four hundred seventy-one thousand, nine hundred seventy-nine".