13140409 has 2 divisors, whose sum is σ = 13140410. Its totient is φ = 13140408.

The previous prime is 13140389. The next prime is 13140427. The reversal of 13140409 is 90404131.

13140409 is nontrivially palindromic in base 11.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 1272384 = 3445^2 + 1128^2 .

It is an emirp because it is prime and its reverse (90404131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13140409 - 2¹⁵ = 13107641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13140409.

It is not a weakly prime, because it can be changed into another prime (13140469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6570204 + 6570205.

It is an arithmetic number, because the mean of its divisors is an integer number (6570205).

Almost surely, 2^13140409 is an apocalyptic number.

It is an amenable number.

13140409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13140409 is an equidigital number, since it uses as much as digits as its factorization.

13140409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13140409 is about 3624.9702067741. The cubic root of 13140409 is about 235.9769739576.

The spelling of 13140409 in words is "thirteen million, one hundred forty thousand, four hundred nine".