7894189 has 4 divisors (see below), whose sum is σ = 7899840. Its totient is φ = 7888540.

The previous prime is 7894157. The next prime is 7894207. The reversal of 7894189 is 9814987.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7894189 - 2⁵ = 7894157 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

7894189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7894489) 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 in 3 ways as a sum of consecutive naturals, for example, 972 + ... + 4090.

It is an arithmetic number, because the mean of its divisors is an integer number (1974960).

Almost surely, 2^7894189 is an apocalyptic number.

It is an amenable number.

7894189 is a deficient number, since it is larger than the sum of its proper divisors (5651).

7894189 is a wasteful number, since it uses less digits than its factorization.

7894189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650.

The product of its digits is 145152, while the sum is 46.

The square root of 7894189 is about 2809.6599438366. The cubic root of 7894189 is about 199.1143253583.

The spelling of 7894189 in words is "seven million, eight hundred ninety-four thousand, one hundred eighty-nine".