47045987 has 4 divisors (see below), whose sum is σ = 49813416. Its totient is φ = 44278560.

The previous prime is 47045963. The next prime is 47046011. The reversal of 47045987 is 78954074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78954074 = 2 ⋅39477037.

It is an interprime number because it is at equal distance from previous prime (47045963) and next prime (47046011).

It is a cyclic number.

It is not a de Polignac number, because 47045987 - 2¹⁸ = 46783843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47045287) 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, 1383689 + ... + 1383722.

It is an arithmetic number, because the mean of its divisors is an integer number (12453354).

Almost surely, 2^47045987 is an apocalyptic number.

47045987 is a deficient number, since it is larger than the sum of its proper divisors (2767429).

47045987 is a wasteful number, since it uses less digits than its factorization.

47045987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767428.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 47045987 is about 6859.0077270696. The cubic root of 47045987 is about 361.0002711252. Note that the first 3 decimals are identical.

The spelling of 47045987 in words is "forty-seven million, forty-five thousand, nine hundred eighty-seven".