47697987 has 4 divisors (see below), whose sum is σ = 63597320. Its totient is φ = 31798656.

The previous prime is 47697983. The next prime is 47698009. The reversal of 47697987 is 78979674.

47697987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47697987 - 2² = 47697983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47697983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7949662 + ... + 7949667.

It is an arithmetic number, because the mean of its divisors is an integer number (15899330).

Almost surely, 2^47697987 is an apocalyptic number.

47697987 is a deficient number, since it is larger than the sum of its proper divisors (15899333).

47697987 is a wasteful number, since it uses less digits than its factorization.

47697987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15899332.

The product of its digits is 5334336, while the sum is 57.

The square root of 47697987 is about 6906.3729265078. The cubic root of 47697987 is about 362.6603004074.

It can be divided in two parts, 47697 and 987, that added together give a palindrome (48684).

The spelling of 47697987 in words is "forty-seven million, six hundred ninety-seven thousand, nine hundred eighty-seven".