9990409149 has 18 divisors (see below), whose sum is σ = 16786606590. Its totient is φ = 5708804976.

The previous prime is 9990409127. The next prime is 9990409157. The reversal of 9990409149 is 9419040999.

9990409149 is a `hidden beast` number, since 9 + 9 + 90 + 409 + 149 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6940056249 + 3050352900 = 83307^2 + 55230^2 .

It is not a de Polignac number, because 9990409149 - 2¹⁵ = 9990376381 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9990409095 and 9990409104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990409199) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11326554 + ... + 11327435.

It is an arithmetic number, because the mean of its divisors is an integer number (932589255).

Almost surely, 2^9990409149 is an apocalyptic number.

It is an amenable number.

9990409149 is a deficient number, since it is larger than the sum of its proper divisors (6796197441).

9990409149 is a wasteful number, since it uses less digits than its factorization.

9990409149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22654009 (or 22653999 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 9990409149 is about 99952.0342414300. The cubic root of 9990409149 is about 2153.7457076506.

The spelling of 9990409149 in words is "nine billion, nine hundred ninety million, four hundred nine thousand, one hundred forty-nine".