13421092409 has 4 divisors (see below), whose sum is σ = 13421325540. Its totient is φ = 13420859280.

The previous prime is 13421092343. The next prime is 13421092469. The reversal of 13421092409 is 90429012431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5406366784 + 8014725625 = 73528^2 + 89525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13421092409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13421092469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38939 + ... + 168399.

It is an arithmetic number, because the mean of its divisors is an integer number (3355331385).

Almost surely, 2^13421092409 is an apocalyptic number.

It is an amenable number.

13421092409 is a deficient number, since it is larger than the sum of its proper divisors (233131).

13421092409 is a wasteful number, since it uses less digits than its factorization.

13421092409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233130.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 13421092409 in words is "thirteen billion, four hundred twenty-one million, ninety-two thousand, four hundred nine".