9950639 has 4 divisors (see below), whose sum is σ = 10099224. Its totient is φ = 9802056.

The previous prime is 9950617. The next prime is 9950641. The reversal of 9950639 is 9360599.

It is a happy number.

9950639 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 9360599 = 1877 ⋅4987.

It is a cyclic number.

It is not a de Polignac number, because 9950639 - 2⁸ = 9950383 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9950596 and 9950605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9950609) 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, 74192 + ... + 74325.

It is an arithmetic number, because the mean of its divisors is an integer number (2524806).

Almost surely, 2^9950639 is an apocalyptic number.

9950639 is a deficient number, since it is larger than the sum of its proper divisors (148585).

9950639 is a wasteful number, since it uses less digits than its factorization.

9950639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148584.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 9950639 is about 3154.4633458007. The cubic root of 9950639 is about 215.0884006407.

The spelling of 9950639 in words is "nine million, nine hundred fifty thousand, six hundred thirty-nine".