12691393 has 12 divisors (see below), whose sum is σ = 14994288. Its totient is φ = 10648560.

The previous prime is 12691391. The next prime is 12691397. The reversal of 12691393 is 39319621.

It is not a de Polignac number, because 12691393 - 2¹ = 12691391 is a prime.

It is a super-2 number, since 2×12691393² = 322142912560898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12691391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1555 + ... + 5272.

It is an arithmetic number, because the mean of its divisors is an integer number (1249524).

Almost surely, 2^12691393 is an apocalyptic number.

12691393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12691393 is a deficient number, since it is larger than the sum of its proper divisors (2302895).

12691393 is a wasteful number, since it uses less digits than its factorization.

12691393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864 (or 6851 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 12691393 is about 3562.4981403504. The cubic root of 12691393 is about 233.2579373182.

It can be divided in two parts, 1269 and 1393, that added together give a palindrome (2662).

The spelling of 12691393 in words is "twelve million, six hundred ninety-one thousand, three hundred ninety-three".