14913721 has 2 divisors, whose sum is σ = 14913722. Its totient is φ = 14913720.

The previous prime is 14913671. The next prime is 14913739. The reversal of 14913721 is 12731941.

14913721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 6400 = 3861^2 + 80^2 .

It is an emirp because it is prime and its reverse (12731941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14913721 - 2⁷ = 14913593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 14913721.

It is not a weakly prime, because it can be changed into another prime (14913751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7456860 + 7456861.

It is an arithmetic number, because the mean of its divisors is an integer number (7456861).

Almost surely, 2^14913721 is an apocalyptic number.

It is an amenable number.

14913721 is a deficient number, since it is larger than the sum of its proper divisors (1).

14913721 is an equidigital number, since it uses as much as digits as its factorization.

14913721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 14913721 is about 3861.8287118929. The cubic root of 14913721 is about 246.1474483438.

The spelling of 14913721 in words is "fourteen million, nine hundred thirteen thousand, seven hundred twenty-one".