8661789 has 32 divisors (see below), whose sum is σ = 13789440. Its totient is φ = 5354496.

The previous prime is 8661769. The next prime is 8661799. The reversal of 8661789 is 9871668.

It is a happy number.

It is not a de Polignac number, because 8661789 - 2¹¹ = 8659741 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51784 + ... + 51950.

It is an arithmetic number, because the mean of its divisors is an integer number (430920).

Almost surely, 2^8661789 is an apocalyptic number.

It is an amenable number.

8661789 is a deficient number, since it is larger than the sum of its proper divisors (5127651).

8661789 is a wasteful number, since it uses less digits than its factorization.

8661789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 300 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 8661789 is about 2943.0917416893. The cubic root of 8661789 is about 205.3694626250.

The spelling of 8661789 in words is "eight million, six hundred sixty-one thousand, seven hundred eighty-nine".