14721689 has 2 divisors, whose sum is σ = 14721690. Its totient is φ = 14721688.

The previous prime is 14721661. The next prime is 14721703. The reversal of 14721689 is 98612741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 4481689 = 3200^2 + 2117^2 .

It is a cyclic number.

It is not a de Polignac number, because 14721689 - 2⁸ = 14721433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (14721389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7360844 + 7360845.

It is an arithmetic number, because the mean of its divisors is an integer number (7360845).

Almost surely, 2^14721689 is an apocalyptic number.

It is an amenable number.

14721689 is a deficient number, since it is larger than the sum of its proper divisors (1).

14721689 is an equidigital number, since it uses as much as digits as its factorization.

14721689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 14721689 is about 3836.8853253648. The cubic root of 14721689 is about 245.0864001810.

The spelling of 14721689 in words is "fourteen million, seven hundred twenty-one thousand, six hundred eighty-nine".