12611389 has 16 divisors (see below), whose sum is σ = 15068160. Its totient is φ = 10327680.

The previous prime is 12611387. The next prime is 12611393. The reversal of 12611389 is 98311621.

It is a cyclic number.

It is not a de Polignac number, because 12611389 - 2¹ = 12611387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12611389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18987 + ... + 19639.

It is an arithmetic number, because the mean of its divisors is an integer number (941760).

Almost surely, 2^12611389 is an apocalyptic number.

It is an amenable number.

12611389 is a deficient number, since it is larger than the sum of its proper divisors (2456771).

12611389 is an equidigital number, since it uses as much as digits as its factorization.

12611389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its digits is 2592, while the sum is 31.

The square root of 12611389 is about 3551.2517511435. The cubic root of 12611389 is about 232.7667666786.

The spelling of 12611389 in words is "twelve million, six hundred eleven thousand, three hundred eighty-nine".