13028909 has 2 divisors, whose sum is σ = 13028910. Its totient is φ = 13028908.

The previous prime is 13028893. The next prime is 13028933. The reversal of 13028909 is 90982031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 426409 = 3550^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 13028909 - 2⁴ = 13028893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13028009) 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, 6514454 + 6514455.

It is an arithmetic number, because the mean of its divisors is an integer number (6514455).

Almost surely, 2^13028909 is an apocalyptic number.

It is an amenable number.

13028909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13028909 is an equidigital number, since it uses as much as digits as its factorization.

13028909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 13028909 is about 3609.5580061830. The cubic root of 13028909 is about 235.3076339258.

The spelling of 13028909 in words is "thirteen million, twenty-eight thousand, nine hundred nine".