990491005 has 8 divisors (see below), whose sum is σ = 1358387712. Its totient is φ = 679193808.

The previous prime is 990490973. The next prime is 990491039. The reversal of 990491005 is 500194099.

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

It is a cyclic number.

It is not a de Polignac number, because 990491005 - 2⁵ = 990490973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 14149837 + ... + 14149906.

It is an arithmetic number, because the mean of its divisors is an integer number (169798464).

Almost surely, 2^990491005 is an apocalyptic number.

It is an amenable number.

990491005 is a deficient number, since it is larger than the sum of its proper divisors (367896707).

990491005 is a wasteful number, since it uses less digits than its factorization.

990491005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28299755.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 990491005 is about 31472.0670595371. The cubic root of 990491005 is about 996.8202348101.

The spelling of 990491005 in words is "nine hundred ninety million, four hundred ninety-one thousand, five".