394611747877 has 2 divisors, whose sum is σ = 394611747878. Its totient is φ = 394611747876.

The previous prime is 394611747863. The next prime is 394611747917. The reversal of 394611747877 is 778747116493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394546040641 + 65707236 = 628129^2 + 8106^2 .

It is a cyclic number.

It is not a de Polignac number, because 394611747877 - 2⁷ = 394611747749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394611747847) 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, 197305873938 + 197305873939.

It is an arithmetic number, because the mean of its divisors is an integer number (197305873939).

Almost surely, 2^394611747877 is an apocalyptic number.

It is an amenable number.

394611747877 is a deficient number, since it is larger than the sum of its proper divisors (1).

394611747877 is an equidigital number, since it uses as much as digits as its factorization.

394611747877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49787136, while the sum is 64.

The spelling of 394611747877 in words is "three hundred ninety-four billion, six hundred eleven million, seven hundred forty-seven thousand, eight hundred seventy-seven".