13989523 has 2 divisors, whose sum is σ = 13989524. Its totient is φ = 13989522.

The previous prime is 13989473. The next prime is 13989541. The reversal of 13989523 is 32598931.

It is a strong prime.

It is an emirp because it is prime and its reverse (32598931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13989523 - 2²¹ = 11892371 is a prime.

It is not a weakly prime, because it can be changed into another prime (13983523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994761 + 6994762.

It is an arithmetic number, because the mean of its divisors is an integer number (6994762).

Almost surely, 2^13989523 is an apocalyptic number.

13989523 is a deficient number, since it is larger than the sum of its proper divisors (1).

13989523 is an equidigital number, since it uses as much as digits as its factorization.

13989523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 13989523 is about 3740.2570767261. The cubic root of 13989523 is about 240.9540898412.

The spelling of 13989523 in words is "thirteen million, nine hundred eighty-nine thousand, five hundred twenty-three".