1393811920819 has 2 divisors, whose sum is σ = 1393811920820. Its totient is φ = 1393811920818.

The previous prime is 1393811920637. The next prime is 1393811920843. The reversal of 1393811920819 is 9180291183931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1393811920819 - 2¹⁹ = 1393811396531 is a prime.

It is a super-2 number, since 2×1393811920819² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1393811920819.

It is not a weakly prime, because it can be changed into another prime (1393811929819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696905960409 + 696905960410.

It is an arithmetic number, because the mean of its divisors is an integer number (696905960410).

Almost surely, 2^{1393811920819} is an apocalyptic number.

1393811920819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393811920819 is an equidigital number, since it uses as much as digits as its factorization.

1393811920819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 55.

The spelling of 1393811920819 in words is "one trillion, three hundred ninety-three billion, eight hundred eleven million, nine hundred twenty thousand, eight hundred nineteen".