80782929 has 12 divisors (see below), whose sum is σ = 123550596. Its totient is φ = 50687232.

The previous prime is 80782921. The next prime is 80782943. The reversal of 80782929 is 92928708.

It can be written as a sum of positive squares in 2 ways, for example, as 55532304 + 25250625 = 7452^2 + 5025^2 .

It is not a de Polignac number, because 80782929 - 2³ = 80782921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80782921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263844 + ... + 264149.

It is an arithmetic number, because the mean of its divisors is an integer number (10295883).

Almost surely, 2^80782929 is an apocalyptic number.

It is an amenable number.

80782929 is a deficient number, since it is larger than the sum of its proper divisors (42767667).

80782929 is a wasteful number, since it uses less digits than its factorization.

80782929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528016 (or 528013 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 80782929 is about 8987.9324096257. The cubic root of 80782929 is about 432.2880184523.

The spelling of 80782929 in words is "eighty million, seven hundred eighty-two thousand, nine hundred twenty-nine".