47185897 has 12 divisors (see below), whose sum is σ = 54685296. Its totient is φ = 40370240.

The previous prime is 47185877. The next prime is 47185907. The reversal of 47185897 is 79858174.

It is a de Polignac number, because none of the positive numbers 2^k-47185897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47185897.

It is not an unprimeable number, because it can be changed into a prime (47185867) 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, 4243 + ... + 10600.

It is an arithmetic number, because the mean of its divisors is an integer number (4557108).

Almost surely, 2^47185897 is an apocalyptic number.

It is an amenable number.

47185897 is a deficient number, since it is larger than the sum of its proper divisors (7499399).

47185897 is a wasteful number, since it uses less digits than its factorization.

47185897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14888 (or 14871 counting only the distinct ones).

The product of its digits is 564480, while the sum is 49.

The square root of 47185897 is about 6869.1991527397. The cubic root of 47185897 is about 361.3577763777.

It can be divided in two parts, 471 and 85897, that added together give a palindrome (86368).

The spelling of 47185897 in words is "forty-seven million, one hundred eighty-five thousand, eight hundred ninety-seven".