134368439809 has 2 divisors, whose sum is σ = 134368439810. Its totient is φ = 134368439808.

The previous prime is 134368439801. The next prime is 134368439857. The reversal of 134368439809 is 908934863431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132425393409 + 1943046400 = 363903^2 + 44080^2 .

It is a cyclic number.

It is not a de Polignac number, because 134368439809 - 2³ = 134368439801 is a prime.

It is not a weakly prime, because it can be changed into another prime (134368439801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67184219904 + 67184219905.

It is an arithmetic number, because the mean of its divisors is an integer number (67184219905).

Almost surely, 2^134368439809 is an apocalyptic number.

It is an amenable number.

134368439809 is a deficient number, since it is larger than the sum of its proper divisors (1).

134368439809 is an equidigital number, since it uses as much as digits as its factorization.

134368439809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 58.

The spelling of 134368439809 in words is "one hundred thirty-four billion, three hundred sixty-eight million, four hundred thirty-nine thousand, eight hundred nine".