80135609 has 2 divisors, whose sum is σ = 80135610. Its totient is φ = 80135608.

The previous prime is 80135593. The next prime is 80135623. The reversal of 80135609 is 90653108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58186384 + 21949225 = 7628^2 + 4685^2 .

It is a cyclic number.

It is not a de Polignac number, because 80135609 - 2⁴ = 80135593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80135669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40067804 + 40067805.

It is an arithmetic number, because the mean of its divisors is an integer number (40067805).

Almost surely, 2^80135609 is an apocalyptic number.

It is an amenable number.

80135609 is a deficient number, since it is larger than the sum of its proper divisors (1).

80135609 is an equidigital number, since it uses as much as digits as its factorization.

80135609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 80135609 is about 8951.8494737121. The cubic root of 80135609 is about 431.1302678459.

The spelling of 80135609 in words is "eighty million, one hundred thirty-five thousand, six hundred nine".