134860409 has 2 divisors, whose sum is σ = 134860410. Its totient is φ = 134860408.

The previous prime is 134860391. The next prime is 134860417. The reversal of 134860409 is 904068431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 25030009 = 10480^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 134860409 - 2¹² = 134856313 is a prime.

It is not a weakly prime, because it can be changed into another prime (134860909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67430204 + 67430205.

It is an arithmetic number, because the mean of its divisors is an integer number (67430205).

Almost surely, 2^134860409 is an apocalyptic number.

It is an amenable number.

134860409 is a deficient number, since it is larger than the sum of its proper divisors (1).

134860409 is an equidigital number, since it uses as much as digits as its factorization.

134860409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 134860409 is about 11612.9414447848. The cubic root of 134860409 is about 512.8159102465.

The spelling of 134860409 in words is "one hundred thirty-four million, eight hundred sixty thousand, four hundred nine".