82471397 has 4 divisors (see below), whose sum is σ = 83073516. Its totient is φ = 81869280.

The previous prime is 82471393. The next prime is 82471423. The reversal of 82471397 is 79317428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52287361 + 30184036 = 7231^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 82471397 - 2² = 82471393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82471393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300854 + ... + 301127.

It is an arithmetic number, because the mean of its divisors is an integer number (20768379).

Almost surely, 2^82471397 is an apocalyptic number.

It is an amenable number.

82471397 is a deficient number, since it is larger than the sum of its proper divisors (602119).

82471397 is a wasteful number, since it uses less digits than its factorization.

82471397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602118.

The product of its digits is 84672, while the sum is 41.

The square root of 82471397 is about 9081.3763824654. The cubic root of 82471397 is about 435.2790687377.

The spelling of 82471397 in words is "eighty-two million, four hundred seventy-one thousand, three hundred ninety-seven".