12320829 has 14 divisors (see below), whose sum is σ = 18473886. Its totient is φ = 8213400.

The previous prime is 12320827. The next prime is 12320849. The reversal of 12320829 is 92802321.

It is a happy number.

12320829 is nontrivially palindromic in base 2 and base 8.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 729 = 3510^2 + 27^2 .

It is not a de Polignac number, because 12320829 - 2¹ = 12320827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320827) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7722 + ... + 9179.

Almost surely, 2^12320829 is an apocalyptic number.

It is an amenable number.

12320829 is a deficient number, since it is larger than the sum of its proper divisors (6153057).

12320829 is an frugal number, since it uses more digits than its factorization.

12320829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16919 (or 16904 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12320829 is about 3510.1038446177. The cubic root of 12320829 is about 230.9652502965.

The spelling of 12320829 in words is "twelve million, three hundred twenty thousand, eight hundred twenty-nine".