5671987 has 2 divisors, whose sum is σ = 5671988. Its totient is φ = 5671986.

The previous prime is 5671979. The next prime is 5671993. The reversal of 5671987 is 7891765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5671987 - 2³ = 5671979 is a prime.

It is not a weakly prime, because it can be changed into another prime (5671927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2835993 + 2835994.

It is an arithmetic number, because the mean of its divisors is an integer number (2835994).

Almost surely, 2^5671987 is an apocalyptic number.

5671987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5671987 is an equidigital number, since it uses as much as digits as its factorization.

5671987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The square root of 5671987 is about 2381.5933741930. The cubic root of 5671987 is about 178.3384860848.

The spelling of 5671987 in words is "five million, six hundred seventy-one thousand, nine hundred eighty-seven".