9900550013 has 4 divisors (see below), whose sum is σ = 9900845088. Its totient is φ = 9900254940.

The previous prime is 9900549991. The next prime is 9900550019. The reversal of 9900550013 is 3100550099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3100550099 = 18401 ⋅168499.

It is a cyclic number.

It is not a de Polignac number, because 9900550013 - 2¹⁸ = 9900287869 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 (9900550019) 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, 89633 + ... + 166838.

It is an arithmetic number, because the mean of its divisors is an integer number (2475211272).

Almost surely, 2^9900550013 is an apocalyptic number.

It is an amenable number.

9900550013 is a deficient number, since it is larger than the sum of its proper divisors (295075).

9900550013 is a wasteful number, since it uses less digits than its factorization.

9900550013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295074.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 9900550013 is about 99501.5075915938. The cubic root of 9900550013 is about 2147.2689327256.

The spelling of 9900550013 in words is "nine billion, nine hundred million, five hundred fifty thousand, thirteen".