394149326719 has 2 divisors, whose sum is σ = 394149326720. Its totient is φ = 394149326718.

The previous prime is 394149326699. The next prime is 394149326731. The reversal of 394149326719 is 917623941493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394149326719 - 2³⁵ = 359789588351 is a prime.

It is a super-2 number, since 2×394149326719² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394149326419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197074663359 + 197074663360.

It is an arithmetic number, because the mean of its divisors is an integer number (197074663360).

Almost surely, 2^394149326719 is an apocalyptic number.

394149326719 is a deficient number, since it is larger than the sum of its proper divisors (1).

394149326719 is an equidigital number, since it uses as much as digits as its factorization.

394149326719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 58.

The spelling of 394149326719 in words is "three hundred ninety-four billion, one hundred forty-nine million, three hundred twenty-six thousand, seven hundred nineteen".