13404289 has 2 divisors, whose sum is σ = 13404290. Its totient is φ = 13404288.

The previous prime is 13404277. The next prime is 13404299. The reversal of 13404289 is 98240431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 5253264 = 2855^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 13404289 - 2⁹ = 13403777 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 13404289.

It is not a weakly prime, because it can be changed into another prime (13404299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702144 + 6702145.

It is an arithmetic number, because the mean of its divisors is an integer number (6702145).

Almost surely, 2^13404289 is an apocalyptic number.

It is an amenable number.

13404289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404289 is an equidigital number, since it uses as much as digits as its factorization.

13404289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 13404289 is about 3661.1868294311. The cubic root of 13404289 is about 237.5461125606.

The spelling of 13404289 in words is "thirteen million, four hundred four thousand, two hundred eighty-nine".