12591973 has 4 divisors (see below), whose sum is σ = 12716748. Its totient is φ = 12467200.

The previous prime is 12591959. The next prime is 12591977. The reversal of 12591973 is 37919521.

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 12404484 + 187489 = 3522^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 12591973 - 2¹⁷ = 12460901 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 (12591977) 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, 62236 + ... + 62437.

It is an arithmetic number, because the mean of its divisors is an integer number (3179187).

Almost surely, 2^12591973 is an apocalyptic number.

It is an amenable number.

12591973 is a deficient number, since it is larger than the sum of its proper divisors (124775).

12591973 is a wasteful number, since it uses less digits than its factorization.

12591973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124774.

The product of its digits is 17010, while the sum is 37.

The square root of 12591973 is about 3548.5170141906. The cubic root of 12591973 is about 232.6472524621.

The spelling of 12591973 in words is "twelve million, five hundred ninety-one thousand, nine hundred seventy-three".