4356940721 has 4 divisors (see below), whose sum is σ = 4979360832. Its totient is φ = 3734520612.

The previous prime is 4356940717. The next prime is 4356940739. The reversal of 4356940721 is 1270496534.

4356940721 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4356940721 - 2² = 4356940717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4356940781) 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, 311210045 + ... + 311210058.

It is an arithmetic number, because the mean of its divisors is an integer number (1244840208).

Almost surely, 2^4356940721 is an apocalyptic number.

It is an amenable number.

4356940721 is a deficient number, since it is larger than the sum of its proper divisors (622420111).

4356940721 is an equidigital number, since it uses as much as digits as its factorization.

4356940721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622420110.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 4356940721 is about 66007.1262895151. The cubic root of 4356940721 is about 1633.2796477657.

The spelling of 4356940721 in words is "four billion, three hundred fifty-six million, nine hundred forty thousand, seven hundred twenty-one".