12989873 has 4 divisors (see below), whose sum is σ = 13989108. Its totient is φ = 11990640.

The previous prime is 12989861. The next prime is 12989881. The reversal of 12989873 is 37898921.

12989873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4963984 + 8025889 = 2228^2 + 2833^2 .

It is a cyclic number.

It is not a de Polignac number, because 12989873 - 2¹⁰ = 12988849 is a prime.

It is a super-2 number, since 2×12989873² = 337473601112258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12989803) 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, 499598 + ... + 499623.

It is an arithmetic number, because the mean of its divisors is an integer number (3497277).

Almost surely, 2^12989873 is an apocalyptic number.

12989873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12989873 is a deficient number, since it is larger than the sum of its proper divisors (999235).

12989873 is an equidigital number, since it uses as much as digits as its factorization.

12989873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999234.

The product of its digits is 217728, while the sum is 47.

The square root of 12989873 is about 3604.1466396361. The cubic root of 12989873 is about 235.0723965869.

The spelling of 12989873 in words is "twelve million, nine hundred eighty-nine thousand, eight hundred seventy-three".