13971657929 has 2 divisors, whose sum is σ = 13971657930. Its totient is φ = 13971657928.

The previous prime is 13971657913. The next prime is 13971657937. The reversal of 13971657929 is 92975617931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13962967225 + 8690704 = 118165^2 + 2948^2 .

It is a cyclic number.

It is not a de Polignac number, because 13971657929 - 2⁴ = 13971657913 is a prime.

It is not a weakly prime, because it can be changed into another prime (13971657979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6985828964 + 6985828965.

It is an arithmetic number, because the mean of its divisors is an integer number (6985828965).

Almost surely, 2^13971657929 is an apocalyptic number.

It is an amenable number.

13971657929 is a deficient number, since it is larger than the sum of its proper divisors (1).

13971657929 is an equidigital number, since it uses as much as digits as its factorization.

13971657929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6429780, while the sum is 59.

The spelling of 13971657929 in words is "thirteen billion, nine hundred seventy-one million, six hundred fifty-seven thousand, nine hundred twenty-nine".