12989705 has 8 divisors (see below), whose sum is σ = 15678792. Its totient is φ = 10331008.

The previous prime is 12989681. The next prime is 12989729. The reversal of 12989705 is 50798921.

12989705 = 2548² + 2549².

It is an interprime number because it is at equal distance from previous prime (12989681) and next prime (12989729).

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 10220809 = 1664^2 + 3197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12989705 - 2¹⁰ = 12988681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6644 + ... + 8373.

It is an arithmetic number, because the mean of its divisors is an integer number (1959849).

Almost surely, 2^12989705 is an apocalyptic number.

12989705 is the 2549-th centered square number.

It is an amenable number.

12989705 is a deficient number, since it is larger than the sum of its proper divisors (2689087).

12989705 is a wasteful number, since it uses less digits than its factorization.

12989705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15195.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 12989705 is about 3604.1233330728. The cubic root of 12989705 is about 235.0713831735.

The spelling of 12989705 in words is "twelve million, nine hundred eighty-nine thousand, seven hundred five".