9950721 has 32 divisors (see below), whose sum is σ = 15261696. Its totient is φ = 5712000.

The previous prime is 9950713. The next prime is 9950753. The reversal of 9950721 is 1270599.

9950721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9950721 - 2³ = 9950713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (9950701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72565 + ... + 72701.

It is an arithmetic number, because the mean of its divisors is an integer number (476928).

Almost surely, 2^9950721 is an apocalyptic number.

It is an amenable number.

9950721 is a deficient number, since it is larger than the sum of its proper divisors (5310975).

9950721 is a wasteful number, since it uses less digits than its factorization.

9950721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 9950721 is about 3154.4763432304. The cubic root of 9950721 is about 215.0889914637.

The spelling of 9950721 in words is "nine million, nine hundred fifty thousand, seven hundred twenty-one".