8620989 has 16 divisors (see below), whose sum is σ = 13108032. Its totient is φ = 4992768.

The previous prime is 8620973. The next prime is 8620993. The reversal of 8620989 is 9890268.

It is not a de Polignac number, because 8620989 - 2⁴ = 8620973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8620989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8620949) 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 15 ways as a sum of consecutive naturals, for example, 5839 + ... + 7164.

It is an arithmetic number, because the mean of its divisors is an integer number (819252).

Almost surely, 2^8620989 is an apocalyptic number.

It is an amenable number.

8620989 is a deficient number, since it is larger than the sum of its proper divisors (4487043).

8620989 is a wasteful number, since it uses less digits than its factorization.

8620989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13036.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 8620989 is about 2936.1520737183. The cubic root of 8620989 is about 205.0465014478.

The spelling of 8620989 in words is "eight million, six hundred twenty thousand, nine hundred eighty-nine".