13523400409 has 2 divisors, whose sum is σ = 13523400410. Its totient is φ = 13523400408.

The previous prime is 13523400389. The next prime is 13523400419. The reversal of 13523400409 is 90400432531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7668855184 + 5854545225 = 87572^2 + 76515^2 .

It is a cyclic number.

It is not a de Polignac number, because 13523400409 - 2⁷ = 13523400281 is a prime.

It is not a weakly prime, because it can be changed into another prime (13523400419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6761700204 + 6761700205.

It is an arithmetic number, because the mean of its divisors is an integer number (6761700205).

Almost surely, 2^13523400409 is an apocalyptic number.

It is an amenable number.

13523400409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13523400409 is an equidigital number, since it uses as much as digits as its factorization.

13523400409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 13523400409 in words is "thirteen billion, five hundred twenty-three million, four hundred thousand, four hundred nine".