12989554 has 4 divisors (see below), whose sum is σ = 19484334. Its totient is φ = 6494776.

The previous prime is 12989539. The next prime is 12989563. The reversal of 12989554 is 45598921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45598921 = 53 ⋅860357.

It can be written as a sum of positive squares in only one way, i.e., 10413529 + 2576025 = 3227^2 + 1605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12989554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247387 + ... + 3247390.

Almost surely, 2^12989554 is an apocalyptic number.

12989554 is a deficient number, since it is larger than the sum of its proper divisors (6494780).

12989554 is an equidigital number, since it uses as much as digits as its factorization.

12989554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494779.

The product of its digits is 129600, while the sum is 43.

The square root of 12989554 is about 3604.1023847832. The cubic root of 12989554 is about 235.0704723004.

The spelling of 12989554 in words is "twelve million, nine hundred eighty-nine thousand, five hundred fifty-four".