1327831 has 2 divisors, whose sum is σ = 1327832. Its totient is φ = 1327830.

The previous prime is 1327801. The next prime is 1327841. The reversal of 1327831 is 1387231.

It is a strong prime.

It is an emirp because it is prime and its reverse (1387231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1327831 is a prime.

It is a super-2 number, since 2×1327831² = 3526270329122, which contains 22 as substring.

1327831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1327796 and 1327805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1327801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663915 + 663916.

It is an arithmetic number, because the mean of its divisors is an integer number (663916).

2^1327831 is an apocalyptic number.

1327831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327831 is an equidigital number, since it uses as much as digits as its factorization.

1327831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 1327831 is about 1152.3154949926. The cubic root of 1327831 is about 109.9126303478.

The spelling of 1327831 in words is "one million, three hundred twenty-seven thousand, eight hundred thirty-one".