394636087 has 2 divisors, whose sum is σ = 394636088. Its totient is φ = 394636086.

The previous prime is 394636037. The next prime is 394636103. The reversal of 394636087 is 780636493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394636087 - 2⁷ = 394635959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394636007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197318043 + 197318044.

It is an arithmetic number, because the mean of its divisors is an integer number (197318044).

Almost surely, 2^394636087 is an apocalyptic number.

394636087 is a deficient number, since it is larger than the sum of its proper divisors (1).

394636087 is an equidigital number, since it uses as much as digits as its factorization.

394636087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 394636087 is about 19865.4495796093. The cubic root of 394636087 is about 733.4979967471.

The spelling of 394636087 in words is "three hundred ninety-four million, six hundred thirty-six thousand, eighty-seven".