13688999971 has 2 divisors, whose sum is σ = 13688999972. Its totient is φ = 13688999970.

The previous prime is 13688999959. The next prime is 13689000019. The reversal of 13688999971 is 17999988631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13688999971 - 2¹³ = 13688991779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13688999971.

It is not a weakly prime, because it can be changed into another prime (13688999771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6844499985 + 6844499986.

It is an arithmetic number, because the mean of its divisors is an integer number (6844499986).

Almost surely, 2^13688999971 is an apocalyptic number.

13688999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13688999971 is an equidigital number, since it uses as much as digits as its factorization.

13688999971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 70.

The spelling of 13688999971 in words is "thirteen billion, six hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred seventy-one".