538113409 has 2 divisors, whose sum is σ = 538113410. Its totient is φ = 538113408.

The previous prime is 538113403. The next prime is 538113437. The reversal of 538113409 is 904311835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527712784 + 10400625 = 22972^2 + 3225^2 .

It is a cyclic number.

It is not a de Polignac number, because 538113409 - 2⁵ = 538113377 is a prime.

It is not a weakly prime, because it can be changed into another prime (538113403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269056704 + 269056705.

It is an arithmetic number, because the mean of its divisors is an integer number (269056705).

Almost surely, 2^538113409 is an apocalyptic number.

It is an amenable number.

538113409 is a deficient number, since it is larger than the sum of its proper divisors (1).

538113409 is an equidigital number, since it uses as much as digits as its factorization.

538113409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 538113409 is about 23197.2715852533. The cubic root of 538113409 is about 813.3758458735.

The spelling of 538113409 in words is "five hundred thirty-eight million, one hundred thirteen thousand, four hundred nine".