990928903 has 4 divisors (see below), whose sum is σ = 992046960. Its totient is φ = 989810848.

The previous prime is 990928901. The next prime is 990928921. The reversal of 990928903 is 309829099.

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 990928903 - 2¹ = 990928901 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 (990928901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557698 + ... + 559471.

It is an arithmetic number, because the mean of its divisors is an integer number (248011740).

Almost surely, 2^990928903 is an apocalyptic number.

990928903 is a deficient number, since it is larger than the sum of its proper divisors (1118057).

990928903 is a wasteful number, since it uses less digits than its factorization.

990928903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118056.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 990928903 is about 31479.0232218219. The cubic root of 990928903 is about 996.9671118890.

The spelling of 990928903 in words is "nine hundred ninety million, nine hundred twenty-eight thousand, nine hundred three".