13971523 has 2 divisors, whose sum is σ = 13971524. Its totient is φ = 13971522.

The previous prime is 13971499. The next prime is 13971539. The reversal of 13971523 is 32517931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13971523 - 2⁵ = 13971491 is a prime.

It is not a weakly prime, because it can be changed into another prime (13971553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6985761 + 6985762.

It is an arithmetic number, because the mean of its divisors is an integer number (6985762).

Almost surely, 2^13971523 is an apocalyptic number.

13971523 is a deficient number, since it is larger than the sum of its proper divisors (1).

13971523 is an equidigital number, since it uses as much as digits as its factorization.

13971523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 13971523 is about 3737.8500504969. The cubic root of 13971523 is about 240.8507021100.

The spelling of 13971523 in words is "thirteen million, nine hundred seventy-one thousand, five hundred twenty-three".