13420387 has 2 divisors, whose sum is σ = 13420388. Its totient is φ = 13420386.

The previous prime is 13420331. The next prime is 13420397. The reversal of 13420387 is 78302431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13420387 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (13420397) 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, 6710193 + 6710194.

It is an arithmetic number, because the mean of its divisors is an integer number (6710194).

Almost surely, 2^13420387 is an apocalyptic number.

13420387 is a deficient number, since it is larger than the sum of its proper divisors (1).

13420387 is an equidigital number, since it uses as much as digits as its factorization.

13420387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 13420387 is about 3663.3846371900. The cubic root of 13420387 is about 237.6411688895.

The spelling of 13420387 in words is "thirteen million, four hundred twenty thousand, three hundred eighty-seven".