80135669 has 2 divisors, whose sum is σ = 80135670. Its totient is φ = 80135668.

The previous prime is 80135623. The next prime is 80135683. The reversal of 80135669 is 96653108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76352644 + 3783025 = 8738^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 80135669 - 2⁸ = 80135413 is a prime.

It is a super-2 number, since 2×80135669² = 12843450892155122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80135609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40067834 + 40067835.

It is an arithmetic number, because the mean of its divisors is an integer number (40067835).

Almost surely, 2^80135669 is an apocalyptic number.

It is an amenable number.

80135669 is a deficient number, since it is larger than the sum of its proper divisors (1).

80135669 is an equidigital number, since it uses as much as digits as its factorization.

80135669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 80135669 is about 8951.8528249743. The cubic root of 80135669 is about 431.1303754460.

The spelling of 80135669 in words is "eighty million, one hundred thirty-five thousand, six hundred sixty-nine".