80824399 has 4 divisors (see below), whose sum is σ = 80842536. Its totient is φ = 80806264.

The previous prime is 80824397. The next prime is 80824433. The reversal of 80824399 is 99342808.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 80824399 - 2¹ = 80824397 is a prime.

It is a super-2 number, since 2×80824399² = 13065166947422402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80824397) 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, 2757 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (20210634).

Almost surely, 2^80824399 is an apocalyptic number.

80824399 is a deficient number, since it is larger than the sum of its proper divisors (18137).

80824399 is a wasteful number, since it uses less digits than its factorization.

80824399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 80824399 is about 8990.2390958194. The cubic root of 80824399 is about 432.3619776316.

The spelling of 80824399 in words is "eighty million, eight hundred twenty-four thousand, three hundred ninety-nine".