6181989 has 16 divisors (see below), whose sum is σ = 9283584. Its totient is φ = 3625200.

The previous prime is 6181969. The next prime is 6181993. The reversal of 6181989 is 9891816.

It is not a de Polignac number, because 6181989 - 2⁹ = 6181477 is a prime.

It is a super-2 number, since 2×6181989² = 76433975992242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6181989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6181919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1999 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (580224).

Almost surely, 2^6181989 is an apocalyptic number.

It is an amenable number.

6181989 is a deficient number, since it is larger than the sum of its proper divisors (3101595).

6181989 is a wasteful number, since it uses less digits than its factorization.

6181989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088.

The product of its digits is 31104, while the sum is 42.

The square root of 6181989 is about 2486.3605933171. The cubic root of 6181989 is about 183.5309908629.

The spelling of 6181989 in words is "six million, one hundred eighty-one thousand, nine hundred eighty-nine".