6371987 has 2 divisors, whose sum is σ = 6371988. Its totient is φ = 6371986.

The previous prime is 6371983. The next prime is 6372001. The reversal of 6371987 is 7891736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6371987 - 2² = 6371983 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6371983) 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, 3185993 + 3185994.

It is an arithmetic number, because the mean of its divisors is an integer number (3185994).

Almost surely, 2^6371987 is an apocalyptic number.

6371987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6371987 is an equidigital number, since it uses as much as digits as its factorization.

6371987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 6371987 is about 2524.2795011646. The cubic root of 6371987 is about 185.3922720982.

The spelling of 6371987 in words is "six million, three hundred seventy-one thousand, nine hundred eighty-seven".