47943591 has 4 divisors (see below), whose sum is σ = 63924792. Its totient is φ = 31962392.

The previous prime is 47943559. The next prime is 47943611. The reversal of 47943591 is 19534974.

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 47943591 - 2⁵ = 47943559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47943551) 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 3 ways as a sum of consecutive naturals, for example, 7990596 + ... + 7990601.

It is an arithmetic number, because the mean of its divisors is an integer number (15981198).

Almost surely, 2^47943591 is an apocalyptic number.

47943591 is a deficient number, since it is larger than the sum of its proper divisors (15981201).

47943591 is a wasteful number, since it uses less digits than its factorization.

47943591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15981200.

The product of its digits is 136080, while the sum is 42.

The square root of 47943591 is about 6924.1310646174. The cubic root of 47943591 is about 363.2816989348.

It can be divided in two parts, 4794 and 3591, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 47943591 in words is "forty-seven million, nine hundred forty-three thousand, five hundred ninety-one".