12270989 has 4 divisors (see below), whose sum is σ = 12314940. Its totient is φ = 12227040.

The previous prime is 12270971. The next prime is 12271003. The reversal of 12270989 is 98907221.

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 6786025 + 5484964 = 2605^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 12270989 - 2⁸ = 12270733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12270919) 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, 21554 + ... + 22115.

It is an arithmetic number, because the mean of its divisors is an integer number (3078735).

Almost surely, 2^12270989 is an apocalyptic number.

It is an amenable number.

12270989 is a deficient number, since it is larger than the sum of its proper divisors (43951).

12270989 is an equidigital number, since it uses as much as digits as its factorization.

12270989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43950.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 12270989 is about 3502.9971453029. The cubic root of 12270989 is about 230.6533972323.

The spelling of 12270989 in words is "twelve million, two hundred seventy thousand, nine hundred eighty-nine".