393138367819 has 2 divisors, whose sum is σ = 393138367820. Its totient is φ = 393138367818.

The previous prime is 393138367793. The next prime is 393138367829. The reversal of 393138367819 is 918763831393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393138367819 - 2³¹ = 390990884171 is a prime.

It is a super-2 number, since 2×393138367819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (393138367829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196569183909 + 196569183910.

It is an arithmetic number, because the mean of its divisors is an integer number (196569183910).

Almost surely, 2^393138367819 is an apocalyptic number.

393138367819 is a deficient number, since it is larger than the sum of its proper divisors (1).

393138367819 is an equidigital number, since it uses as much as digits as its factorization.

393138367819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 61.

The spelling of 393138367819 in words is "three hundred ninety-three billion, one hundred thirty-eight million, three hundred sixty-seven thousand, eight hundred nineteen".