13501947929 has 2 divisors, whose sum is σ = 13501947930. Its totient is φ = 13501947928.

The previous prime is 13501947839. The next prime is 13501947947. The reversal of 13501947929 is 92974910531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10935512329 + 2566435600 = 104573^2 + 50660^2 .

It is a cyclic number.

It is not a de Polignac number, because 13501947929 - 2¹⁶ = 13501882393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13501947959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750973964 + 6750973965.

It is an arithmetic number, because the mean of its divisors is an integer number (6750973965).

Almost surely, 2^13501947929 is an apocalyptic number.

It is an amenable number.

13501947929 is a deficient number, since it is larger than the sum of its proper divisors (1).

13501947929 is an equidigital number, since it uses as much as digits as its factorization.

13501947929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 13501947929 in words is "thirteen billion, five hundred one million, nine hundred forty-seven thousand, nine hundred twenty-nine".