5771987 has 4 divisors (see below), whose sum is σ = 6216000. Its totient is φ = 5327976.

The previous prime is 5771981. The next prime is 5771989. The reversal of 5771987 is 7891775.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5771987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5771981) 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, 221987 + ... + 222012.

It is an arithmetic number, because the mean of its divisors is an integer number (1554000).

Almost surely, 2^5771987 is an apocalyptic number.

5771987 is a deficient number, since it is larger than the sum of its proper divisors (444013).

5771987 is a wasteful number, since it uses less digits than its factorization.

5771987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444012.

The product of its digits is 123480, while the sum is 44.

The square root of 5771987 is about 2402.4959937532. The cubic root of 5771987 is about 179.3804523103.

The spelling of 5771987 in words is "five million, seven hundred seventy-one thousand, nine hundred eighty-seven".