12693649 has 2 divisors, whose sum is σ = 12693650. Its totient is φ = 12693648.

The previous prime is 12693647. The next prime is 12693671. The reversal of 12693649 is 94639621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 1803649 = 3300^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 12693649 - 2¹ = 12693647 is a prime.

It is a super-2 number, since 2×12693649² = 322257449870402, which contains 22 as substring.

Together with 12693647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12693647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6346824 + 6346825.

It is an arithmetic number, because the mean of its divisors is an integer number (6346825).

Almost surely, 2^12693649 is an apocalyptic number.

It is an amenable number.

12693649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12693649 is an equidigital number, since it uses as much as digits as its factorization.

12693649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 12693649 is about 3562.8147580249. The cubic root of 12693649 is about 233.2717576748.

The spelling of 12693649 in words is "twelve million, six hundred ninety-three thousand, six hundred forty-nine".