13507987 has 2 divisors, whose sum is σ = 13507988. Its totient is φ = 13507986.

The previous prime is 13507961. The next prime is 13507999. The reversal of 13507987 is 78970531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13507987 is a prime.

It is not a weakly prime, because it can be changed into another prime (13507927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6753993 + 6753994.

It is an arithmetic number, because the mean of its divisors is an integer number (6753994).

Almost surely, 2^13507987 is an apocalyptic number.

13507987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13507987 is an equidigital number, since it uses as much as digits as its factorization.

13507987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 13507987 is about 3675.3213464948. The cubic root of 13507987 is about 238.1571062126.

The spelling of 13507987 in words is "thirteen million, five hundred seven thousand, nine hundred eighty-seven".