13421909 has 8 divisors (see below), whose sum is σ = 13716960. Its totient is φ = 13129776.

The previous prime is 13421897. The next prime is 13421917. The reversal of 13421909 is 90912431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13421909 - 2¹² = 13417813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421509) 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 7 ways as a sum of consecutive naturals, for example, 10307 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (1714620).

Almost surely, 2^13421909 is an apocalyptic number.

It is an amenable number.

13421909 is a deficient number, since it is larger than the sum of its proper divisors (295051).

13421909 is a wasteful number, since it uses less digits than its factorization.

13421909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 13421909 is about 3663.5923626954. The cubic root of 13421909 is about 237.6501521423.

The spelling of 13421909 in words is "thirteen million, four hundred twenty-one thousand, nine hundred nine".