8541989 has 4 divisors (see below), whose sum is σ = 8562240. Its totient is φ = 8521740.

The previous prime is 8541983. The next prime is 8541991. The reversal of 8541989 is 9891458.

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 a de Polignac number, because none of the positive numbers 2^k-8541989 is a prime.

It is a super-2 number, since 2×8541989² = 145931152152242, 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 (8541983) 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, 9479 + ... + 10340.

It is an arithmetic number, because the mean of its divisors is an integer number (2140560).

Almost surely, 2^8541989 is an apocalyptic number.

It is an amenable number.

8541989 is a deficient number, since it is larger than the sum of its proper divisors (20251).

8541989 is a wasteful number, since it uses less digits than its factorization.

8541989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20250.

The product of its digits is 103680, while the sum is 44.

The square root of 8541989 is about 2922.6681303220. The cubic root of 8541989 is about 204.4182515300.

The spelling of 8541989 in words is "eight million, five hundred forty-one thousand, nine hundred eighty-nine".