8141989 has 4 divisors (see below), whose sum is σ = 8214156. Its totient is φ = 8069824.

The previous prime is 8141981. The next prime is 8141993. The reversal of 8141989 is 9891418.

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

It can be written as a sum of positive squares in 2 ways, for example, as 396900 + 7745089 = 630^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 8141989 - 2³ = 8141981 is a prime.

It is a super-2 number, since 2×8141989² = 132583969752242, 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 (8141981) 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, 35914 + ... + 36139.

It is an arithmetic number, because the mean of its divisors is an integer number (2053539).

Almost surely, 2^8141989 is an apocalyptic number.

It is an amenable number.

8141989 is a deficient number, since it is larger than the sum of its proper divisors (72167).

8141989 is a wasteful number, since it uses less digits than its factorization.

8141989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72166.

The product of its digits is 20736, while the sum is 40.

The square root of 8141989 is about 2853.4170743163. The cubic root of 8141989 is about 201.1763095816.

The spelling of 8141989 in words is "eight million, one hundred forty-one thousand, nine hundred eighty-nine".