9990049 has 4 divisors (see below), whose sum is σ = 10002564. Its totient is φ = 9977536.

The previous prime is 9990047. The next prime is 9990089. The reversal of 9990049 is 9400999.

9990049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8410000 + 1580049 = 2900^2 + 1257^2 .

It is a cyclic number.

It is not a de Polignac number, because 9990049 - 2¹ = 9990047 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9990049 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9989993 and 9990020.

It is not an unprimeable number, because it can be changed into a prime (9990047) 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, 4972 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (2500641).

Almost surely, 2^9990049 is an apocalyptic number.

It is an amenable number.

9990049 is a deficient number, since it is larger than the sum of its proper divisors (12515).

9990049 is a wasteful number, since it uses less digits than its factorization.

9990049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12514.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 9990049 is about 3160.7038773033. The cubic root of 9990049 is about 215.3719826873.

The spelling of 9990049 in words is "nine million, nine hundred ninety thousand, forty-nine".