80782369 has 4 divisors (see below), whose sum is σ = 81988144. Its totient is φ = 79576596.

The previous prime is 80782367. The next prime is 80782393. The reversal of 80782369 is 96328708.

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 80782369 - 2¹ = 80782367 is a prime.

It is a super-2 number, since 2×80782369² = 13051582282504322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80782367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602787 + ... + 602920.

It is an arithmetic number, because the mean of its divisors is an integer number (20497036).

Almost surely, 2^80782369 is an apocalyptic number.

It is an amenable number.

80782369 is a deficient number, since it is larger than the sum of its proper divisors (1205775).

80782369 is a wasteful number, since it uses less digits than its factorization.

80782369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205774.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 80782369 is about 8987.9012566895. The cubic root of 80782369 is about 432.2870195537.

The spelling of 80782369 in words is "eighty million, seven hundred eighty-two thousand, three hundred sixty-nine".