80529769 has 2 divisors, whose sum is σ = 80529770. Its totient is φ = 80529768.

The previous prime is 80529751. The next prime is 80529851. The reversal of 80529769 is 96792508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64208169 + 16321600 = 8013^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 80529769 - 2⁹ = 80529257 is a prime.

It is a super-2 number, since 2×80529769² = 12970087390386722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80529269) 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, 40264884 + 40264885.

It is an arithmetic number, because the mean of its divisors is an integer number (40264885).

Almost surely, 2^80529769 is an apocalyptic number.

It is an amenable number.

80529769 is a deficient number, since it is larger than the sum of its proper divisors (1).

80529769 is an equidigital number, since it uses as much as digits as its factorization.

80529769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 80529769 is about 8973.8380306310. The cubic root of 80529769 is about 431.8359734652.

The spelling of 80529769 in words is "eighty million, five hundred twenty-nine thousand, seven hundred sixty-nine".