80872829 has 4 divisors (see below), whose sum is σ = 81340476. Its totient is φ = 80405184.

The previous prime is 80872817. The next prime is 80872849. The reversal of 80872829 is 92827808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33235225 + 47637604 = 5765^2 + 6902^2 .

It is a cyclic number.

It is not a de Polignac number, because 80872829 - 2²⁴ = 64095613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80872829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80872849) 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, 233564 + ... + 233909.

It is an arithmetic number, because the mean of its divisors is an integer number (20335119).

Almost surely, 2^80872829 is an apocalyptic number.

It is an amenable number.

80872829 is a deficient number, since it is larger than the sum of its proper divisors (467647).

80872829 is a wasteful number, since it uses less digits than its factorization.

80872829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467646.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 80872829 is about 8992.9321692093. The cubic root of 80872829 is about 432.4483175238.

It can be divided in two parts, 808 and 72829, that added together give a palindrome (73637).

The spelling of 80872829 in words is "eighty million, eight hundred seventy-two thousand, eight hundred twenty-nine".