9990010999 has 2 divisors, whose sum is σ = 9990011000. Its totient is φ = 9990010998.

The previous prime is 9990010997. The next prime is 9990011099. The reversal of 9990010999 is 9990100999.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9990100999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9990010999 - 2¹ = 9990010997 is a prime.

Together with 9990010997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990010997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995005499 + 4995005500.

It is an arithmetic number, because the mean of its divisors is an integer number (4995005500).

Almost surely, 2^9990010999 is an apocalyptic number.

9990010999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990010999 is an equidigital number, since it uses as much as digits as its factorization.

9990010999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 55.

The square root of 9990010999 is about 99950.0425162491. The cubic root of 9990010999 is about 2153.7170960348.

Subtracting 9990010999 from its reverse (9990100999), we obtain a square (90000 = 300²).

The spelling of 9990010999 in words is "nine billion, nine hundred ninety million, ten thousand, nine hundred ninety-nine".