1327987 has 2 divisors, whose sum is σ = 1327988. Its totient is φ = 1327986.

The previous prime is 1327973. The next prime is 1327999. The reversal of 1327987 is 7897231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1327987 - 2¹¹ = 1325939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1327387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663993 + 663994.

It is an arithmetic number, because the mean of its divisors is an integer number (663994).

2^1327987 is an apocalyptic number.

1327987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327987 is an equidigital number, since it uses as much as digits as its factorization.

1327987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 1327987 is about 1152.3831827999. The cubic root of 1327987 is about 109.9169345349.

It can be divided in two parts, 13279 and 87, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 1327987 in words is "one million, three hundred twenty-seven thousand, nine hundred eighty-seven".