1391141831 has 2 divisors, whose sum is σ = 1391141832. Its totient is φ = 1391141830.

The previous prime is 1391141819. The next prime is 1391141881. The reversal of 1391141831 is 1381411931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391141831 is a prime.

It is a super-2 number, since 2×1391141831² = 3870551187916065122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391141881) 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, 695570915 + 695570916.

It is an arithmetic number, because the mean of its divisors is an integer number (695570916).

Almost surely, 2^1391141831 is an apocalyptic number.

1391141831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391141831 is an equidigital number, since it uses as much as digits as its factorization.

1391141831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 1391141831 is about 37298.0137674917. The cubic root of 1391141831 is about 1116.3245350416.

The spelling of 1391141831 in words is "one billion, three hundred ninety-one million, one hundred forty-one thousand, eight hundred thirty-one".