80427769 has 2 divisors, whose sum is σ = 80427770. Its totient is φ = 80427768.

The previous prime is 80427719. The next prime is 80427821. The reversal of 80427769 is 96772408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 25371369 = 7420^2 + 5037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80427769 is a prime.

It is a super-2 number, since 2×80427769² = 12937252052634722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80427709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40213884 + 40213885.

It is an arithmetic number, because the mean of its divisors is an integer number (40213885).

Almost surely, 2^80427769 is an apocalyptic number.

It is an amenable number.

80427769 is a deficient number, since it is larger than the sum of its proper divisors (1).

80427769 is an equidigital number, since it uses as much as digits as its factorization.

80427769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 80427769 is about 8968.1530428511. The cubic root of 80427769 is about 431.6535735077.

The spelling of 80427769 in words is "eighty million, four hundred twenty-seven thousand, seven hundred sixty-nine".