80520823 has 16 divisors (see below), whose sum is σ = 87713280. Its totient is φ = 73626496.

The previous prime is 80520821. The next prime is 80520827. The reversal of 80520823 is 32802508.

It is a cyclic number.

It is not a de Polignac number, because 80520823 - 2¹ = 80520821 is a prime.

It is a super-3 number, since 3×80520823³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80520791 and 80520800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80520821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142740 + ... + 143302.

It is an arithmetic number, because the mean of its divisors is an integer number (5482080).

Almost surely, 2^80520823 is an apocalyptic number.

80520823 is a deficient number, since it is larger than the sum of its proper divisors (7192457).

80520823 is a wasteful number, since it uses less digits than its factorization.

80520823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 80520823 is about 8973.3395678532. The cubic root of 80520823 is about 431.8199820800.

The spelling of 80520823 in words is "eighty million, five hundred twenty thousand, eight hundred twenty-three".