14354675721 has 9 divisors (see below), whose sum is σ = 20735050791. Its totient is φ = 9569544192.

The previous prime is 14354675719. The next prime is 14354675723. The reversal of 14354675721 is 12757645341.

The square root of 14354675721 is 119811.

It is a perfect power (a square), and thus also a powerful number.

14354675721 is a `hidden beast` number, since 1 + 4 + 35 + 46 + 7 + 572 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (14354675719) and next prime (14354675723).

It can be written as a sum of positive squares in only one way, i.e., 12251169225 + 2103506496 = 110685^2 + 45864^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 14354675721 - 2¹ = 14354675719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (14354675723) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 339465 + ... + 379401.

Almost surely, 2^14354675721 is an apocalyptic number.

14354675721 is the 119811-st square number.

14354675721 is the 59906-th centered octagonal number.

It is an amenable number.

14354675721 is a deficient number, since it is larger than the sum of its proper divisors (6380375070).

14354675721 is an frugal number, since it uses more digits than its factorization.

14354675721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79880 (or 39940 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 14354675721 in words is "fourteen billion, three hundred fifty-four million, six hundred seventy-five thousand, seven hundred twenty-one".