990199020901 has 8 divisors (see below), whose sum is σ = 1013389842080. Its totient is φ = 967015606032.

The previous prime is 990199020851. The next prime is 990199020911. The reversal of 990199020901 is 109020991099.

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

It is not a de Polignac number, because 990199020901 - 2⁷ = 990199020773 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 (990199020911) 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, 1580595 + ... + 2116288.

It is an arithmetic number, because the mean of its divisors is an integer number (126673730260).

Almost surely, 2^990199020901 is an apocalyptic number.

It is an amenable number.

990199020901 is a deficient number, since it is larger than the sum of its proper divisors (23190821179).

990199020901 is a wasteful number, since it uses less digits than its factorization.

990199020901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703155.

The product of its (nonzero) digits is 118098, while the sum is 49.

The spelling of 990199020901 in words is "nine hundred ninety billion, one hundred ninety-nine million, twenty thousand, nine hundred one".