80829389 has 4 divisors (see below), whose sum is σ = 81130140. Its totient is φ = 80528640.

The previous prime is 80829377. The next prime is 80829449. The reversal of 80829389 is 98392808.

It is a happy number.

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 23600164 + 57229225 = 4858^2 + 7565^2 .

It is a cyclic number.

It is not a de Polignac number, because 80829389 - 2¹⁶ = 80763853 is a prime.

It is a super-2 number, since 2×80829389² = 13066780252226642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80829289) 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, 149972 + ... + 150509.

It is an arithmetic number, because the mean of its divisors is an integer number (20282535).

Almost surely, 2^80829389 is an apocalyptic number.

It is an amenable number.

80829389 is a deficient number, since it is larger than the sum of its proper divisors (300751).

80829389 is a wasteful number, since it uses less digits than its factorization.

80829389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300750.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 80829389 is about 8990.5166147447. The cubic root of 80829389 is about 432.3708752825.

It can be divided in two parts, 80829 and 389, that added together give a palindrome (81218).

The spelling of 80829389 in words is "eighty million, eight hundred twenty-nine thousand, three hundred eighty-nine".