82047897 has 20 divisors (see below), whose sum is σ = 123703140. Its totient is φ = 54190944.

The previous prime is 82047887. The next prime is 82047941. The reversal of 82047897 is 79874028.

It can be written as a sum of positive squares in 2 ways, for example, as 28772496 + 53275401 = 5364^2 + 7299^2 .

It is not a de Polignac number, because 82047897 - 2⁴ = 82047881 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (82047857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4183 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (6185157).

Almost surely, 2^82047897 is an apocalyptic number.

It is an amenable number.

82047897 is a deficient number, since it is larger than the sum of its proper divisors (41655243).

82047897 is a wasteful number, since it uses less digits than its factorization.

82047897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414 (or 9405 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 82047897 is about 9058.0294214581. The cubic root of 82047897 is about 434.5327205799.

It can be divided in two parts, 82047 and 897, that added together give a square (82944 = 288²).

The spelling of 82047897 in words is "eighty-two million, forty-seven thousand, eight hundred ninety-seven".