655857889 has 4 divisors (see below), whose sum is σ = 655973424. Its totient is φ = 655742356.

The previous prime is 655857883. The next prime is 655857899. The reversal of 655857889 is 988758556.

655857889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 655857889 - 2¹¹ = 655855841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655857883) 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, 48787 + ... + 60760.

It is an arithmetic number, because the mean of its divisors is an integer number (163993356).

Almost surely, 2^655857889 is an apocalyptic number.

It is an amenable number.

655857889 is a deficient number, since it is larger than the sum of its proper divisors (115535).

655857889 is a wasteful number, since it uses less digits than its factorization.

655857889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115534.

The product of its digits is 24192000, while the sum is 61.

The square root of 655857889 is about 25609.7225482823. The cubic root of 655857889 is about 868.8335488614.

The spelling of 655857889 in words is "six hundred fifty-five million, eight hundred fifty-seven thousand, eight hundred eighty-nine".