9990967 has 4 divisors (see below), whose sum is σ = 11418256. Its totient is φ = 8563680.

The previous prime is 9990961. The next prime is 9990989. The reversal of 9990967 is 7690999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7690999 = 2161 ⋅3559.

It is a cyclic number.

It is not a de Polignac number, because 9990967 - 2¹⁵ = 9958199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9990967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713634 + ... + 713647.

It is an arithmetic number, because the mean of its divisors is an integer number (2854564).

Almost surely, 2^9990967 is an apocalyptic number.

9990967 is a deficient number, since it is larger than the sum of its proper divisors (1427289).

9990967 is a wasteful number, since it uses less digits than its factorization.

9990967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427288.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 9990967 is about 3160.8490947845. The cubic root of 9990967 is about 215.3785794325.

Subtracting from 9990967 its reverse (7690999), we obtain a cube (2299968 = 132³).

The spelling of 9990967 in words is "nine million, nine hundred ninety thousand, nine hundred sixty-seven".