16389194 has 4 divisors (see below), whose sum is σ = 24583794. Its totient is φ = 8194596.

The previous prime is 16389193. The next prime is 16389199. The reversal of 16389194 is 49198361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49198361 = 1051 ⋅46811.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 2289169 = 3755^2 + 1513^2 .

It is not an unprimeable number, because it can be changed into a prime (16389193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097297 + ... + 4097300.

Almost surely, 2^16389194 is an apocalyptic number.

16389194 is a deficient number, since it is larger than the sum of its proper divisors (8194600).

16389194 is an equidigital number, since it uses as much as digits as its factorization.

16389194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194599.

The product of its digits is 46656, while the sum is 41.

The square root of 16389194 is about 4048.3569506653. The cubic root of 16389194 is about 254.0110045452.

The spelling of 16389194 in words is "sixteen million, three hundred eighty-nine thousand, one hundred ninety-four".