1327731931 has 2 divisors, whose sum is σ = 1327731932. Its totient is φ = 1327731930.

The previous prime is 1327731857. The next prime is 1327731947. The reversal of 1327731931 is 1391377231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1327731931 - 2⁷ = 1327731803 is a prime.

It is a super-2 number, since 2×1327731931² = 3525744161193977522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1327731131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663865965 + 663865966.

It is an arithmetic number, because the mean of its divisors is an integer number (663865966).

Almost surely, 2^1327731931 is an apocalyptic number.

1327731931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327731931 is an equidigital number, since it uses as much as digits as its factorization.

1327731931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 37.

The square root of 1327731931 is about 36438.0560815200. The cubic root of 1327731931 is about 1099.0989676573.

The spelling of 1327731931 in words is "one billion, three hundred twenty-seven million, seven hundred thirty-one thousand, nine hundred thirty-one".