13156643 has 2 divisors, whose sum is σ = 13156644. Its totient is φ = 13156642.

The previous prime is 13156639. The next prime is 13156651. The reversal of 13156643 is 34665131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13156643 - 2² = 13156639 is a prime.

It is not a weakly prime, because it can be changed into another prime (13156673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6578321 + 6578322.

It is an arithmetic number, because the mean of its divisors is an integer number (6578322).

Almost surely, 2^13156643 is an apocalyptic number.

13156643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13156643 is an equidigital number, since it uses as much as digits as its factorization.

13156643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 13156643 is about 3627.2087064298. The cubic root of 13156643 is about 236.0741113121.

The spelling of 13156643 in words is "thirteen million, one hundred fifty-six thousand, six hundred forty-three".