990655903 has 8 divisors (see below), whose sum is σ = 1007007920. Its totient is φ = 974350080.

The previous prime is 990655873. The next prime is 990655907. The reversal of 990655903 is 309556099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990655903 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 (990655907) 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 7 ways as a sum of consecutive naturals, for example, 33103 + ... + 55471.

It is an arithmetic number, because the mean of its divisors is an integer number (125875990).

Almost surely, 2^990655903 is an apocalyptic number.

990655903 is a deficient number, since it is larger than the sum of its proper divisors (16352017).

990655903 is a wasteful number, since it uses less digits than its factorization.

990655903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23097.

The product of its (nonzero) digits is 328050, while the sum is 46.

The square root of 990655903 is about 31474.6867021739. The cubic root of 990655903 is about 996.8755489729.

The spelling of 990655903 in words is "nine hundred ninety million, six hundred fifty-five thousand, nine hundred three".