13499999987 has 2 divisors, whose sum is σ = 13499999988. Its totient is φ = 13499999986.

The previous prime is 13499999971. The next prime is 13500000037. The reversal of 13499999987 is 78999999431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13499999987 - 2⁴ = 13499999971 is a prime.

It is not a weakly prime, because it can be changed into another prime (13499999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6749999993 + 6749999994.

It is an arithmetic number, because the mean of its divisors is an integer number (6749999994).

Almost surely, 2^13499999987 is an apocalyptic number.

13499999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13499999987 is an equidigital number, since it uses as much as digits as its factorization.

13499999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357128352, while the sum is 77.

The spelling of 13499999987 in words is "thirteen billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-seven".