394078199 has 2 divisors, whose sum is σ = 394078200. Its totient is φ = 394078198.

The previous prime is 394078189. The next prime is 394078211. The reversal of 394078199 is 991870493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394078199 - 2²⁸ = 125642743 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 (394078109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197039099 + 197039100.

It is an arithmetic number, because the mean of its divisors is an integer number (197039100).

Almost surely, 2^394078199 is an apocalyptic number.

394078199 is a deficient number, since it is larger than the sum of its proper divisors (1).

394078199 is an equidigital number, since it uses as much as digits as its factorization.

394078199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 394078199 is about 19851.4029479027. The cubic root of 394078199 is about 733.1521906356.

The spelling of 394078199 in words is "three hundred ninety-four million, seventy-eight thousand, one hundred ninety-nine".