655489903 has 4 divisors (see below), whose sum is σ = 683989488. Its totient is φ = 626990320.

The previous prime is 655489867. The next prime is 655489909. The reversal of 655489903 is 309984556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655489903 - 2⁹ = 655489391 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655489909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14249758 + ... + 14249803.

It is an arithmetic number, because the mean of its divisors is an integer number (170997372).

Almost surely, 2^655489903 is an apocalyptic number.

655489903 is a deficient number, since it is larger than the sum of its proper divisors (28499585).

655489903 is a wasteful number, since it uses less digits than its factorization.

655489903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28499584.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The square root of 655489903 is about 25602.5370422542. The cubic root of 655489903 is about 868.6710246308.

The spelling of 655489903 in words is "six hundred fifty-five million, four hundred eighty-nine thousand, nine hundred three".