47404987 has 8 divisors (see below), whose sum is σ = 54302976. Its totient is φ = 40538472.

The previous prime is 47404957. The next prime is 47405003. The reversal of 47404987 is 78940474.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47404987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47404957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4543 + ... + 10744.

It is an arithmetic number, because the mean of its divisors is an integer number (6787872).

Almost surely, 2^47404987 is an apocalyptic number.

47404987 is a deficient number, since it is larger than the sum of its proper divisors (6897989).

47404987 is a wasteful number, since it uses less digits than its factorization.

47404987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15737.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 47404987 is about 6885.1279581428. The cubic root of 47404987 is about 361.9161894028.

The spelling of 47404987 in words is "forty-seven million, four hundred four thousand, nine hundred eighty-seven".