9990173599 has 4 divisors (see below), whose sum is σ = 11417341264. Its totient is φ = 8563005936.

The previous prime is 9990173597. The next prime is 9990173629. The reversal of 9990173599 is 9953710999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9990173599 - 2¹ = 9990173597 is a prime.

It is a super-2 number, since 2×9990173599² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990173591) 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, 713583822 + ... + 713583835.

It is an arithmetic number, because the mean of its divisors is an integer number (2854335316).

Almost surely, 2^9990173599 is an apocalyptic number.

9990173599 is a deficient number, since it is larger than the sum of its proper divisors (1427167665).

9990173599 is a wasteful number, since it uses less digits than its factorization.

9990173599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427167664.

The product of its (nonzero) digits is 6200145, while the sum is 61.

The square root of 9990173599 is about 99950.8559192967. The cubic root of 9990173599 is about 2153.7287807900.

The spelling of 9990173599 in words is "nine billion, nine hundred ninety million, one hundred seventy-three thousand, five hundred ninety-nine".