394937677 has 2 divisors, whose sum is σ = 394937678. Its totient is φ = 394937676.

The previous prime is 394937657. The next prime is 394937717. The reversal of 394937677 is 776739493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245266921 + 149670756 = 15661^2 + 12234^2 .

It is a cyclic number.

It is not a de Polignac number, because 394937677 - 2⁷ = 394937549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394937617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197468838 + 197468839.

It is an arithmetic number, because the mean of its divisors is an integer number (197468839).

Almost surely, 2^394937677 is an apocalyptic number.

It is an amenable number.

394937677 is a deficient number, since it is larger than the sum of its proper divisors (1).

394937677 is an equidigital number, since it uses as much as digits as its factorization.

394937677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6001128, while the sum is 55.

The square root of 394937677 is about 19873.0389472773. The cubic root of 394937677 is about 733.6848011976.

The spelling of 394937677 in words is "three hundred ninety-four million, nine hundred thirty-seven thousand, six hundred seventy-seven".