80405269 has 4 divisors (see below), whose sum is σ = 91891744. Its totient is φ = 68918796.

The previous prime is 80405261. The next prime is 80405279. The reversal of 80405269 is 96250408.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80405269 - 2³ = 80405261 is a prime.

It is a super-2 number, since 2×80405269² = 12930014565924722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80405261) 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 in 3 ways as a sum of consecutive naturals, for example, 5743227 + ... + 5743240.

It is an arithmetic number, because the mean of its divisors is an integer number (22972936).

Almost surely, 2^80405269 is an apocalyptic number.

It is an amenable number.

80405269 is a deficient number, since it is larger than the sum of its proper divisors (11486475).

80405269 is a wasteful number, since it uses less digits than its factorization.

80405269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11486474.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 80405269 is about 8966.8985162095. The cubic root of 80405269 is about 431.6133174646.

The spelling of 80405269 in words is "eighty million, four hundred five thousand, two hundred sixty-nine".