13947704987 has 2 divisors, whose sum is σ = 13947704988. Its totient is φ = 13947704986.

The previous prime is 13947704983. The next prime is 13947704999. The reversal of 13947704987 is 78940774931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13947704987 - 2² = 13947704983 is a prime.

It is not a weakly prime, because it can be changed into another prime (13947704983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6973852493 + 6973852494.

It is an arithmetic number, because the mean of its divisors is an integer number (6973852494).

Almost surely, 2^13947704987 is an apocalyptic number.

13947704987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13947704987 is an equidigital number, since it uses as much as digits as its factorization.

13947704987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 59.

The spelling of 13947704987 in words is "thirteen billion, nine hundred forty-seven million, seven hundred four thousand, nine hundred eighty-seven".