13220687 has 2 divisors, whose sum is σ = 13220688. Its totient is φ = 13220686.

The previous prime is 13220671. The next prime is 13220717. The reversal of 13220687 is 78602231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13220687 - 2⁴ = 13220671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610343 + 6610344.

It is an arithmetic number, because the mean of its divisors is an integer number (6610344).

Almost surely, 2^13220687 is an apocalyptic number.

13220687 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220687 is an equidigital number, since it uses as much as digits as its factorization.

13220687 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 29.

The square root of 13220687 is about 3636.0262650316. The cubic root of 13220687 is about 236.4565458530.

The spelling of 13220687 in words is "thirteen million, two hundred twenty thousand, six hundred eighty-seven".