394797858953 has 2 divisors, whose sum is σ = 394797858954. Its totient is φ = 394797858952.

The previous prime is 394797858943. The next prime is 394797858979. The reversal of 394797858953 is 359858797493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287024848009 + 107773010944 = 535747^2 + 328288^2 .

It is a cyclic number.

It is not a de Polignac number, because 394797858953 - 2¹⁰ = 394797857929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (394797858913) 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, 197398929476 + 197398929477.

It is an arithmetic number, because the mean of its divisors is an integer number (197398929477).

Almost surely, 2^394797858953 is an apocalyptic number.

It is an amenable number.

394797858953 is a deficient number, since it is larger than the sum of its proper divisors (1).

394797858953 is an equidigital number, since it uses as much as digits as its factorization.

394797858953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2057529600, while the sum is 77.

The spelling of 394797858953 in words is "three hundred ninety-four billion, seven hundred ninety-seven million, eight hundred fifty-eight thousand, nine hundred fifty-three".