5981987 has 8 divisors (see below), whose sum is σ = 6543552. Its totient is φ = 5423400.

The previous prime is 5981971. The next prime is 5981993. The reversal of 5981987 is 7891895.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5981987 - 2⁴ = 5981971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5981947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7208 + ... + 7994.

It is an arithmetic number, because the mean of its divisors is an integer number (817944).

Almost surely, 2^5981987 is an apocalyptic number.

5981987 is a deficient number, since it is larger than the sum of its proper divisors (561565).

5981987 is a wasteful number, since it uses less digits than its factorization.

5981987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489.

The product of its digits is 181440, while the sum is 47.

The square root of 5981987 is about 2445.8100907470. The cubic root of 5981987 is about 181.5300337087.

The spelling of 5981987 in words is "five million, nine hundred eighty-one thousand, nine hundred eighty-seven".