394961328277 has 2 divisors, whose sum is σ = 394961328278. Its totient is φ = 394961328276.

The previous prime is 394961328271. The next prime is 394961328317. The reversal of 394961328277 is 772823169493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230055488881 + 164905839396 = 479641^2 + 406086^2 .

It is a cyclic number.

It is not a de Polignac number, because 394961328277 - 2¹⁹ = 394960803989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394961328271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197480664138 + 197480664139.

It is an arithmetic number, because the mean of its divisors is an integer number (197480664139).

Almost surely, 2^394961328277 is an apocalyptic number.

It is an amenable number.

394961328277 is a deficient number, since it is larger than the sum of its proper divisors (1).

394961328277 is an equidigital number, since it uses as much as digits as its factorization.

394961328277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 61.

The spelling of 394961328277 in words is "three hundred ninety-four billion, nine hundred sixty-one million, three hundred twenty-eight thousand, two hundred seventy-seven".