14728447381 has 2 divisors, whose sum is σ = 14728447382. Its totient is φ = 14728447380.

The previous prime is 14728447373. The next prime is 14728447427. The reversal of 14728447381 is 18374482741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14057896356 + 670551025 = 118566^2 + 25895^2 .

It is a cyclic number.

It is not a de Polignac number, because 14728447381 - 2³ = 14728447373 is a prime.

It is a super-2 number, since 2×14728447381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14728447351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7364223690 + 7364223691.

It is an arithmetic number, because the mean of its divisors is an integer number (7364223691).

Almost surely, 2^14728447381 is an apocalyptic number.

It is an amenable number.

14728447381 is a deficient number, since it is larger than the sum of its proper divisors (1).

14728447381 is an equidigital number, since it uses as much as digits as its factorization.

14728447381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 49.

The spelling of 14728447381 in words is "fourteen billion, seven hundred twenty-eight million, four hundred forty-seven thousand, three hundred eighty-one".