394382011987 has 2 divisors, whose sum is σ = 394382011988. Its totient is φ = 394382011986.

The previous prime is 394382011927. The next prime is 394382012021. The reversal of 394382011987 is 789110283493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394382011987 - 2¹⁵ = 394381979219 is a prime.

It is not a weakly prime, because it can be changed into another prime (394382011927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197191005993 + 197191005994.

It is an arithmetic number, because the mean of its divisors is an integer number (197191005994).

Almost surely, 2^394382011987 is an apocalyptic number.

394382011987 is a deficient number, since it is larger than the sum of its proper divisors (1).

394382011987 is an equidigital number, since it uses as much as digits as its factorization.

394382011987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 394382011987 in words is "three hundred ninety-four billion, three hundred eighty-two million, eleven thousand, nine hundred eighty-seven".