13434821 has 2 divisors, whose sum is σ = 13434822. Its totient is φ = 13434820.

The previous prime is 13434803. The next prime is 13434851. The reversal of 13434821 is 12843431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 3290596 = 3185^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 13434821 - 2¹⁴ = 13418437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13434851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6717410 + 6717411.

It is an arithmetic number, because the mean of its divisors is an integer number (6717411).

Almost surely, 2^13434821 is an apocalyptic number.

It is an amenable number.

13434821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13434821 is an equidigital number, since it uses as much as digits as its factorization.

13434821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 13434821 is about 3665.3541438720. The cubic root of 13434821 is about 237.7263349293.

The spelling of 13434821 in words is "thirteen million, four hundred thirty-four thousand, eight hundred twenty-one".