13509967 has 2 divisors, whose sum is σ = 13509968. Its totient is φ = 13509966.

The previous prime is 13509943. The next prime is 13509971. The reversal of 13509967 is 76990531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13509967 - 2²³ = 5121359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13509367) 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, 6754983 + 6754984.

It is an arithmetic number, because the mean of its divisors is an integer number (6754984).

Almost surely, 2^13509967 is an apocalyptic number.

13509967 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509967 is an equidigital number, since it uses as much as digits as its factorization.

13509967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 13509967 is about 3675.5907008262. The cubic root of 13509967 is about 238.1687419960.

The spelling of 13509967 in words is "thirteen million, five hundred nine thousand, nine hundred sixty-seven".