85997547 has 12 divisors (see below), whose sum is σ = 124304544. Its totient is φ = 57292080.

The previous prime is 85997539. The next prime is 85997563. The reversal of 85997547 is 74579958.

85997547 is a `hidden beast` number, since 8 + 5 + 9 + 97 + 547 = 666.

It is not a de Polignac number, because 85997547 - 2³ = 85997539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85997493 and 85997502.

It is not an unprimeable number, because it can be changed into a prime (85997537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17038 + ... + 21500.

It is an arithmetic number, because the mean of its divisors is an integer number (10358712).

Almost surely, 2^85997547 is an apocalyptic number.

85997547 is a deficient number, since it is larger than the sum of its proper divisors (38306997).

85997547 is a wasteful number, since it uses less digits than its factorization.

85997547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610 (or 6607 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 85997547 is about 9273.4862376563. The cubic root of 85997547 is about 441.3962994779.

The spelling of 85997547 in words is "eighty-five million, nine hundred ninety-seven thousand, five hundred forty-seven".