47997185 has 4 divisors (see below), whose sum is σ = 57596628. Its totient is φ = 38397744.

The previous prime is 47997181. The next prime is 47997203. The reversal of 47997185 is 58179974.

It is a Cunningham number, because it is equal to 6928²+1.

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 17272336 + 30724849 = 4156^2 + 5543^2 .

It is a cyclic number.

It is not a de Polignac number, because 47997185 - 2² = 47997181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47997181) 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, 4799714 + ... + 4799723.

It is an arithmetic number, because the mean of its divisors is an integer number (14399157).

Almost surely, 2^47997185 is an apocalyptic number.

It is an amenable number.

47997185 is a deficient number, since it is larger than the sum of its proper divisors (9599443).

47997185 is an equidigital number, since it uses as much as digits as its factorization.

47997185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9599442.

The product of its digits is 635040, while the sum is 50.

The square root of 47997185 is about 6928.0000721709. Note that the first 4 decimals coincide. The cubic root of 47997185 is about 363.4170139908.

The spelling of 47997185 in words is "forty-seven million, nine hundred ninety-seven thousand, one hundred eighty-five".