80379765 has 12 divisors (see below), whose sum is σ = 139325004. Its totient is φ = 42869184.

The previous prime is 80379751. The next prime is 80379781. The reversal of 80379765 is 56797308.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22953681 + 57426084 = 4791^2 + 7578^2 .

It is not a de Polignac number, because 80379765 - 2¹³ = 80371573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1786217 = 80379765 / (8 + 0 + 3 + 7 + 9 + 7 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 80379765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 893064 + ... + 893153.

It is an arithmetic number, because the mean of its divisors is an integer number (11610417).

Almost surely, 2^80379765 is an apocalyptic number.

It is an amenable number.

80379765 is a deficient number, since it is larger than the sum of its proper divisors (58945239).

80379765 is a wasteful number, since it uses less digits than its factorization.

80379765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786228 (or 1786225 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 80379765 is about 8965.4762840576. The cubic root of 80379765 is about 431.5676777104.

The spelling of 80379765 in words is "eighty million, three hundred seventy-nine thousand, seven hundred sixty-five".