13520387 has 2 divisors, whose sum is σ = 13520388. Its totient is φ = 13520386.

The previous prime is 13520383. The next prime is 13520411. The reversal of 13520387 is 78302531.

It is a weak prime.

It is an emirp because it is prime and its reverse (78302531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13520387 - 2² = 13520383 is a prime.

It is not a weakly prime, because it can be changed into another prime (13520383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760193 + 6760194.

It is an arithmetic number, because the mean of its divisors is an integer number (6760194).

Almost surely, 2^13520387 is an apocalyptic number.

13520387 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520387 is an equidigital number, since it uses as much as digits as its factorization.

13520387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13520387 is about 3677.0078868558. The cubic root of 13520387 is about 238.2299580480.

The spelling of 13520387 in words is "thirteen million, five hundred twenty thousand, three hundred eighty-seven".