1327999 has 2 divisors, whose sum is σ = 1328000. Its totient is φ = 1327998.

The previous prime is 1327987. The next prime is 1328003. The reversal of 1327999 is 9997231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1327999 - 2⁷ = 1327871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1327099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663999 + 664000.

It is an arithmetic number, because the mean of its divisors is an integer number (664000).

2^1327999 is an apocalyptic number.

1327999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327999 is an equidigital number, since it uses as much as digits as its factorization.

1327999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The square root of 1327999 is about 1152.3883893896. The cubic root of 1327999 is about 109.9172656122.

The spelling of 1327999 in words is "one million, three hundred twenty-seven thousand, nine hundred ninety-nine".