12989078 has 4 divisors (see below), whose sum is σ = 19483620. Its totient is φ = 6494538.

The previous prime is 12989077. The next prime is 12989083. The reversal of 12989078 is 87098921.

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

It is a super-2 number, since 2×12989078² = 337432294580168, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989077) by changing a digit.

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, 3247268 + ... + 3247271.

It is an arithmetic number, because the mean of its divisors is an integer number (4870905).

Almost surely, 2^12989078 is an apocalyptic number.

12989078 is a deficient number, since it is larger than the sum of its proper divisors (6494542).

12989078 is an equidigital number, since it uses as much as digits as its factorization.

12989078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494541.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12989078 is about 3604.0363483184. The cubic root of 12989078 is about 235.0676008929.

The spelling of 12989078 in words is "twelve million, nine hundred eighty-nine thousand, seventy-eight".