394796977 has 2 divisors, whose sum is σ = 394796978. Its totient is φ = 394796976.

The previous prime is 394796959. The next prime is 394796989. The reversal of 394796977 is 779697493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214593201 + 180203776 = 14649^2 + 13424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394796977 is a prime.

It is not a weakly prime, because it can be changed into another prime (394796917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197398488 + 197398489.

It is an arithmetic number, because the mean of its divisors is an integer number (197398489).

Almost surely, 2^394796977 is an apocalyptic number.

It is an amenable number.

394796977 is a deficient number, since it is larger than the sum of its proper divisors (1).

394796977 is an equidigital number, since it uses as much as digits as its factorization.

394796977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18003384, while the sum is 61.

The square root of 394796977 is about 19869.4986600065. The cubic root of 394796977 is about 733.5976636408.

The spelling of 394796977 in words is "three hundred ninety-four million, seven hundred ninety-six thousand, nine hundred seventy-seven".