47641987 has 4 divisors (see below), whose sum is σ = 50149480. Its totient is φ = 45134496.

The previous prime is 47641961. The next prime is 47641991. The reversal of 47641987 is 78914674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78914674 = 2 ⋅39457337.

It is a cyclic number.

It is not a de Polignac number, because 47641987 - 2¹⁹ = 47117699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47648987) 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, 1253718 + ... + 1253755.

It is an arithmetic number, because the mean of its divisors is an integer number (12537370).

Almost surely, 2^47641987 is an apocalyptic number.

47641987 is a deficient number, since it is larger than the sum of its proper divisors (2507493).

47641987 is a wasteful number, since it uses less digits than its factorization.

47641987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507492.

The product of its digits is 338688, while the sum is 46.

The square root of 47641987 is about 6902.3175093587. The cubic root of 47641987 is about 362.5183172670.

The spelling of 47641987 in words is "forty-seven million, six hundred forty-one thousand, nine hundred eighty-seven".