47020987 has 4 divisors (see below), whose sum is σ = 50638000. Its totient is φ = 43403976.

The previous prime is 47020951. The next prime is 47021011. The reversal of 47020987 is 78902074.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78902074 = 2 ⋅39451037.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47020987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47020907) 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, 1808487 + ... + 1808512.

It is an arithmetic number, because the mean of its divisors is an integer number (12659500).

Almost surely, 2^47020987 is an apocalyptic number.

47020987 is a deficient number, since it is larger than the sum of its proper divisors (3617013).

47020987 is a wasteful number, since it uses less digits than its factorization.

47020987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617012.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 47020987 is about 6857.1850638582. The cubic root of 47020987 is about 360.9363152213.

The spelling of 47020987 in words is "forty-seven million, twenty thousand, nine hundred eighty-seven".