389194999 has 2 divisors, whose sum is σ = 389195000. Its totient is φ = 389194998.

The previous prime is 389194969. The next prime is 389195017. The reversal of 389194999 is 999491983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389194999 - 2²¹ = 387097847 is a prime.

It is a super-2 number, since 2×389194999² = 302945494493220002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389194909) 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, 194597499 + 194597500.

It is an arithmetic number, because the mean of its divisors is an integer number (194597500).

Almost surely, 2^389194999 is an apocalyptic number.

389194999 is a deficient number, since it is larger than the sum of its proper divisors (1).

389194999 is an equidigital number, since it uses as much as digits as its factorization.

389194999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 61.

The square root of 389194999 is about 19728.0257248413. The cubic root of 389194999 is about 730.1113228613. Note that the first 3 decimals are identical.

The spelling of 389194999 in words is "three hundred eighty-nine million, one hundred ninety-four thousand, nine hundred ninety-nine".