7189906 has 4 divisors (see below), whose sum is σ = 10784862. Its totient is φ = 3594952.

The previous prime is 7189879. The next prime is 7189907. The reversal of 7189906 is 6099817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4601025 + 2588881 = 2145^2 + 1609^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7189907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1797475 + ... + 1797478.

Almost surely, 2^7189906 is an apocalyptic number.

7189906 is a deficient number, since it is larger than the sum of its proper divisors (3594956).

7189906 is a wasteful number, since it uses less digits than its factorization.

7189906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594955.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 7189906 is about 2681.4000074588. The cubic root of 7189906 is about 193.0075972203.

The spelling of 7189906 in words is "seven million, one hundred eighty-nine thousand, nine hundred six".