13404889 has 2 divisors, whose sum is σ = 13404890. Its totient is φ = 13404888.

The previous prime is 13404887. The next prime is 13404901. The reversal of 13404889 is 98840431.

13404889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 444889 = 3600^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 13404889 - 2¹ = 13404887 is a prime.

Together with 13404887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13404887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702444 + 6702445.

It is an arithmetic number, because the mean of its divisors is an integer number (6702445).

Almost surely, 2^13404889 is an apocalyptic number.

It is an amenable number.

13404889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404889 is an equidigital number, since it uses as much as digits as its factorization.

13404889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 13404889 is about 3661.2687691564. The cubic root of 13404889 is about 237.5496568376.

The spelling of 13404889 in words is "thirteen million, four hundred four thousand, eight hundred eighty-nine".