990000990001 has 4 divisors (see below), whose sum is σ = 1048236342372. Its totient is φ = 931765637632.

The previous prime is 990000989953. The next prime is 990000990037. The reversal of 990000990001 is 100099000099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100099000099 = 7 ⋅14299857157.

It can be written as a sum of positive squares in 2 ways, for example, as 503042655025 + 486958334976 = 709255^2 + 697824^2 .

It is a cyclic number.

It is not a de Polignac number, because 990000990001 - 2⁹ = 990000989489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990000910001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29117676160 + ... + 29117676193.

It is an arithmetic number, because the mean of its divisors is an integer number (262059085593).

Almost surely, 2^990000990001 is an apocalyptic number.

It is an amenable number.

990000990001 is a deficient number, since it is larger than the sum of its proper divisors (58235352371).

990000990001 is a wasteful number, since it uses less digits than its factorization.

990000990001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58235352370.

The product of its (nonzero) digits is 6561, while the sum is 37.

The spelling of 990000990001 in words is "nine hundred ninety billion, nine hundred ninety thousand, one".