82971138 has 16 divisors (see below), whose sum is σ = 174676320. Its totient is φ = 26201376.

The previous prime is 82971137. The next prime is 82971179. The reversal of 82971138 is 83117928.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82971096 and 82971105.

It is not an unprimeable number, because it can be changed into a prime (82971137) 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, 363795 + ... + 364022.

It is an arithmetic number, because the mean of its divisors is an integer number (10917270).

Almost surely, 2^82971138 is an apocalyptic number.

82971138 is an abundant number, since it is smaller than the sum of its proper divisors (91705182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82971138 is a wasteful number, since it uses less digits than its factorization.

82971138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727841.

The product of its digits is 24192, while the sum is 39.

The square root of 82971138 is about 9108.8494333807. The cubic root of 82971138 is about 436.1564998043.

The spelling of 82971138 in words is "eighty-two million, nine hundred seventy-one thousand, one hundred thirty-eight".