13481409 has 16 divisors (see below), whose sum is σ = 18385920. Its totient is φ = 8784720.

The previous prime is 13481407. The next prime is 13481417. The reversal of 13481409 is 90418431.

It is a happy number.

It is not a de Polignac number, because 13481409 - 2¹ = 13481407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13481401) 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 in 15 ways as a sum of consecutive naturals, for example, 35382 + ... + 35760.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^13481409 is an apocalyptic number.

It is an amenable number.

13481409 is a deficient number, since it is larger than the sum of its proper divisors (4904511).

13481409 is a wasteful number, since it uses less digits than its factorization.

13481409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 13481409 is about 3671.7038279251. The cubic root of 13481409 is about 238.0008062021. Note that the first 3 decimals are identical.

The spelling of 13481409 in words is "thirteen million, four hundred eighty-one thousand, four hundred nine".