9990869 has 8 divisors (see below), whose sum is σ = 11444160. Its totient is φ = 8544096.

The previous prime is 9990863. The next prime is 9990887. The reversal of 9990869 is 9680999.

9990869 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9990869 is a prime.

It is a super-2 number, since 2×9990869² = 199634926750322, which contains 22 as substring.

9990869 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2297 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (1430520).

Almost surely, 2^9990869 is an apocalyptic number.

It is an amenable number.

9990869 is a deficient number, since it is larger than the sum of its proper divisors (1453291).

9990869 is a wasteful number, since it uses less digits than its factorization.

9990869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 9990869 is about 3160.8335925828. The cubic root of 9990869 is about 215.3778752241.

The spelling of 9990869 in words is "nine million, nine hundred ninety thousand, eight hundred sixty-nine".