1391141819 has 2 divisors, whose sum is σ = 1391141820. Its totient is φ = 1391141818.

The previous prime is 1391141809. The next prime is 1391141831. The reversal of 1391141819 is 9181411931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1391141819 - 2¹⁶ = 1391076283 is a prime.

It is a super-2 number, since 2×1391141819² = 3870551121141257522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1391141809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695570909 + 695570910.

It is an arithmetic number, because the mean of its divisors is an integer number (695570910).

Almost surely, 2^1391141819 is an apocalyptic number.

1391141819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391141819 is an equidigital number, since it uses as much as digits as its factorization.

1391141819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 38.

The square root of 1391141819 is about 37298.0136066252. The cubic root of 1391141819 is about 1116.3245318318.

The spelling of 1391141819 in words is "one billion, three hundred ninety-one million, one hundred forty-one thousand, eight hundred nineteen".