13995409 has 2 divisors, whose sum is σ = 13995410. Its totient is φ = 13995408.

The previous prime is 13995383. The next prime is 13995433. The reversal of 13995409 is 90459931.

13995409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 4558225 = 3072^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 13995409 - 2⁷ = 13995281 is a prime.

It is equal to p₉₀₉₇₈₇ and since 13995409 and 909787 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13995439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6997704 + 6997705.

It is an arithmetic number, because the mean of its divisors is an integer number (6997705).

Almost surely, 2^13995409 is an apocalyptic number.

It is an amenable number.

13995409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13995409 is an equidigital number, since it uses as much as digits as its factorization.

13995409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 13995409 is about 3741.0438382890. The cubic root of 13995409 is about 240.9878783869.

The spelling of 13995409 in words is "thirteen million, nine hundred ninety-five thousand, four hundred nine".