10179721 has 4 divisors (see below), whose sum is σ = 10196244. Its totient is φ = 10163200.

The previous prime is 10179713. The next prime is 10179733. The reversal of 10179721 is 12797101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12797101 = 43 ⋅297607.

It can be written as a sum of positive squares in 2 ways, for example, as 9369721 + 810000 = 3061^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 10179721 - 2³ = 10179713 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 10179721.

It is not an unprimeable number, because it can be changed into a prime (10179751) 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 3 ways as a sum of consecutive naturals, for example, 7300 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (2549061).

Almost surely, 2^10179721 is an apocalyptic number.

It is an amenable number.

10179721 is a deficient number, since it is larger than the sum of its proper divisors (16523).

10179721 is an equidigital number, since it uses as much as digits as its factorization.

10179721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16522.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 10179721 is about 3190.5675043791. The cubic root of 10179721 is about 216.7264705395.

The spelling of 10179721 in words is "ten million, one hundred seventy-nine thousand, seven hundred twenty-one".