990190123 has 8 divisors (see below), whose sum is σ = 1103130000. Its totient is φ = 882503328.

The previous prime is 990190121. The next prime is 990190133. The reversal of 990190123 is 321091099.

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 990190123 - 2¹ = 990190121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990190121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1312873 + ... + 1313626.

It is an arithmetic number, because the mean of its divisors is an integer number (137891250).

Almost surely, 2^990190123 is an apocalyptic number.

990190123 is a deficient number, since it is larger than the sum of its proper divisors (112939877).

990190123 is a wasteful number, since it uses less digits than its factorization.

990190123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626541.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 990190123 is about 31467.2865528631. The cubic root of 990190123 is about 996.7192897102.

The spelling of 990190123 in words is "nine hundred ninety million, one hundred ninety thousand, one hundred twenty-three".