80523769 has 2 divisors, whose sum is σ = 80523770. Its totient is φ = 80523768.

The previous prime is 80523763. The next prime is 80523787. The reversal of 80523769 is 96732508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77211369 + 3312400 = 8787^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 80523769 - 2¹⁵ = 80491001 is a prime.

It is a super-2 number, since 2×80523769² = 12968154747930722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80523763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40261884 + 40261885.

It is an arithmetic number, because the mean of its divisors is an integer number (40261885).

Almost surely, 2^80523769 is an apocalyptic number.

It is an amenable number.

80523769 is a deficient number, since it is larger than the sum of its proper divisors (1).

80523769 is an equidigital number, since it uses as much as digits as its factorization.

80523769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 80523769 is about 8973.5037192838. The cubic root of 80523769 is about 431.8252483209.

The spelling of 80523769 in words is "eighty million, five hundred twenty-three thousand, seven hundred sixty-nine".