7189881 has 4 divisors (see below), whose sum is σ = 9586512. Its totient is φ = 4793252.

The previous prime is 7189879. The next prime is 7189907. The reversal of 7189881 is 1889817.

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 an emirpimes, since its reverse is a distinct semiprime: 1889817 = 3 ⋅629939.

It is a cyclic number.

It is not a de Polignac number, because 7189881 - 2¹ = 7189879 is a prime.

It is a super-2 number, since 2×7189881² = 103388777588322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7189081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198311 + ... + 1198316.

It is an arithmetic number, because the mean of its divisors is an integer number (2396628).

Almost surely, 2^7189881 is an apocalyptic number.

It is an amenable number.

7189881 is a deficient number, since it is larger than the sum of its proper divisors (2396631).

7189881 is a wasteful number, since it uses less digits than its factorization.

7189881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396630.

The product of its digits is 32256, while the sum is 42.

The square root of 7189881 is about 2681.3953457109. The cubic root of 7189881 is about 193.0073735180.

The spelling of 7189881 in words is "seven million, one hundred eighty-nine thousand, eight hundred eighty-one".