12340989 has 12 divisors (see below), whose sum is σ = 17881500. Its totient is φ = 8201664.

The previous prime is 12340981. The next prime is 12341009. The reversal of 12340989 is 98904321.

It can be written as a sum of positive squares in 2 ways, for example, as 5212089 + 7128900 = 2283^2 + 2670^2 .

It is not a de Polignac number, because 12340989 - 2³ = 12340981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1177 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (1490125).

Almost surely, 2^12340989 is an apocalyptic number.

It is an amenable number.

12340989 is a deficient number, since it is larger than the sum of its proper divisors (5540511).

12340989 is a wasteful number, since it uses less digits than its factorization.

12340989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 12340989 is about 3512.9743807776. The cubic root of 12340989 is about 231.0911542203.

The spelling of 12340989 in words is "twelve million, three hundred forty thousand, nine hundred eighty-nine".