655709903 has 4 divisors (see below), whose sum is σ = 663077520. Its totient is φ = 648342288.

The previous prime is 655709897. The next prime is 655709911. The reversal of 655709903 is 309907556.

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 655709903 - 2¹² = 655705807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655709983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683675 + ... + 3683852.

It is an arithmetic number, because the mean of its divisors is an integer number (165769380).

Almost surely, 2^655709903 is an apocalyptic number.

655709903 is a deficient number, since it is larger than the sum of its proper divisors (7367617).

655709903 is an equidigital number, since it uses as much as digits as its factorization.

655709903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367616.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 655709903 is about 25606.8331310219. The cubic root of 655709903 is about 868.7681968619.

The spelling of 655709903 in words is "six hundred fifty-five million, seven hundred nine thousand, nine hundred three".