5991387 has 4 divisors (see below), whose sum is σ = 7988520. Its totient is φ = 3994256.

The previous prime is 5991379. The next prime is 5991389. The reversal of 5991387 is 7831995.

It is a happy number.

5991387 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5991387 - 2³ = 5991379 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (5991389) 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, 998562 + ... + 998567.

It is an arithmetic number, because the mean of its divisors is an integer number (1997130).

Almost surely, 2^5991387 is an apocalyptic number.

5991387 is a deficient number, since it is larger than the sum of its proper divisors (1997133).

5991387 is a wasteful number, since it uses less digits than its factorization.

5991387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997132.

The product of its digits is 68040, while the sum is 42.

The square root of 5991387 is about 2447.7309901213. The cubic root of 5991387 is about 181.6250684244.

The spelling of 5991387 in words is "five million, nine hundred ninety-one thousand, three hundred eighty-seven".