7942189 has 4 divisors (see below), whose sum is σ = 7952256. Its totient is φ = 7932124.

The previous prime is 7942177. The next prime is 7942211. The reversal of 7942189 is 9812497.

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.

It is a cyclic number.

It is not a de Polignac number, because 7942189 - 2¹⁷ = 7811117 is a prime.

It is a super-2 number, since 2×7942189² = 126156732223442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7946189) 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 in 3 ways as a sum of consecutive naturals, for example, 3739 + ... + 5464.

It is an arithmetic number, because the mean of its divisors is an integer number (1988064).

Almost surely, 2^7942189 is an apocalyptic number.

It is an amenable number.

7942189 is a deficient number, since it is larger than the sum of its proper divisors (10067).

7942189 is an equidigital number, since it uses as much as digits as its factorization.

7942189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10066.

The product of its digits is 36288, while the sum is 40.

The square root of 7942189 is about 2818.1889574690. The cubic root of 7942189 is about 199.5170765298.

The spelling of 7942189 in words is "seven million, nine hundred forty-two thousand, one hundred eighty-nine".