14028453721 has 4 divisors (see below), whose sum is σ = 14028788452. Its totient is φ = 14028118992.

The previous prime is 14028453671. The next prime is 14028453731. The reversal of 14028453721 is 12735482041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12735482041 = 47 ⋅270967703.

It can be written as a sum of positive squares in 2 ways, for example, as 6435248400 + 7593205321 = 80220^2 + 87139^2 .

It is a cyclic number.

It is not a de Polignac number, because 14028453721 - 2¹¹ = 14028451673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14028453731) 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, 93690 + ... + 191923.

It is an arithmetic number, because the mean of its divisors is an integer number (3507197113).

Almost surely, 2^14028453721 is an apocalyptic number.

It is an amenable number.

14028453721 is a deficient number, since it is larger than the sum of its proper divisors (334731).

14028453721 is an equidigital number, since it uses as much as digits as its factorization.

14028453721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334730.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 14028453721 in words is "fourteen billion, twenty-eight million, four hundred fifty-three thousand, seven hundred twenty-one".