134220409 has 2 divisors, whose sum is σ = 134220410. Its totient is φ = 134220408.

The previous prime is 134220353. The next prime is 134220413. The reversal of 134220409 is 904022431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 24285184 = 10485^2 + 4928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134220409 is a prime.

It is not a weakly prime, because it can be changed into another prime (134220419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67110204 + 67110205.

It is an arithmetic number, because the mean of its divisors is an integer number (67110205).

Almost surely, 2^134220409 is an apocalyptic number.

It is an amenable number.

134220409 is a deficient number, since it is larger than the sum of its proper divisors (1).

134220409 is an equidigital number, since it uses as much as digits as its factorization.

134220409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 134220409 is about 11585.3532099803. The cubic root of 134220409 is about 512.0034090451.

The spelling of 134220409 in words is "one hundred thirty-four million, two hundred twenty thousand, four hundred nine".