394149326807 has 2 divisors, whose sum is σ = 394149326808. Its totient is φ = 394149326806.

The previous prime is 394149326731. The next prime is 394149326863. The reversal of 394149326807 is 708623941493.

It is an a-pointer prime, because the next prime (394149326863) can be obtained adding 394149326807 to its sum of digits (56).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394149326807 - 2¹⁸ = 394149064663 is a prime.

It is a super-2 number, since 2×394149326807² (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 (394149322807) 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, 197074663403 + 197074663404.

It is an arithmetic number, because the mean of its divisors is an integer number (197074663404).

Almost surely, 2^394149326807 is an apocalyptic number.

394149326807 is a deficient number, since it is larger than the sum of its proper divisors (1).

394149326807 is an equidigital number, since it uses as much as digits as its factorization.

394149326807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 394149326807 in words is "three hundred ninety-four billion, one hundred forty-nine million, three hundred twenty-six thousand, eight hundred seven".