990492623 has 8 divisors (see below), whose sum is σ = 994992000. Its totient is φ = 986003928.

The previous prime is 990492619. The next prime is 990492661. The reversal of 990492623 is 326294099.

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 990492623 - 2² = 990492619 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 (990492683) 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 7 ways as a sum of consecutive naturals, for example, 224840 + ... + 229202.

It is an arithmetic number, because the mean of its divisors is an integer number (124374000).

Almost surely, 2^990492623 is an apocalyptic number.

990492623 is a deficient number, since it is larger than the sum of its proper divisors (4499377).

990492623 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (990492622) it forms an eRAP, since the sums of their prime factors are consecutive (5340 and 5341).

990492623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5341.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 990492623 is about 31472.0927648607. The cubic root of 990492623 is about 996.8207775895.

The spelling of 990492623 in words is "nine hundred ninety million, four hundred ninety-two thousand, six hundred twenty-three".