12691583 has 2 divisors, whose sum is σ = 12691584. Its totient is φ = 12691582.

The previous prime is 12691541. The next prime is 12691621. The reversal of 12691583 is 38519621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12691583 - 2⁶ = 12691519 is a prime.

It is a super-2 number, since 2×12691583² = 322152558091778, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12601583) 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 as a sum of consecutive naturals, namely, 6345791 + 6345792.

It is an arithmetic number, because the mean of its divisors is an integer number (6345792).

Almost surely, 2^12691583 is an apocalyptic number.

12691583 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691583 is an equidigital number, since it uses as much as digits as its factorization.

12691583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 12691583 is about 3562.5248069312. The cubic root of 12691583 is about 233.2591013299.

The spelling of 12691583 in words is "twelve million, six hundred ninety-one thousand, five hundred eighty-three".