47545987 has 4 divisors (see below), whose sum is σ = 47893176. Its totient is φ = 47198800.

The previous prime is 47545973. The next prime is 47545997. The reversal of 47545987 is 78954574.

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

It is a cyclic number.

It is not a de Polignac number, because 47545987 - 2⁷ = 47545859 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 47545987.

It is not an unprimeable number, because it can be changed into a prime (47545997) 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, 173389 + ... + 173662.

It is an arithmetic number, because the mean of its divisors is an integer number (11973294).

Almost surely, 2^47545987 is an apocalyptic number.

47545987 is a deficient number, since it is larger than the sum of its proper divisors (347189).

47545987 is a wasteful number, since it uses less digits than its factorization.

47545987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347188.

The product of its digits is 1411200, while the sum is 49.

The square root of 47545987 is about 6895.3598165723. The cubic root of 47545987 is about 362.2746585228.

The spelling of 47545987 in words is "forty-seven million, five hundred forty-five thousand, nine hundred eighty-seven".