13626449 has 2 divisors, whose sum is σ = 13626450. Its totient is φ = 13626448.

The previous prime is 13626443. The next prime is 13626451. The reversal of 13626449 is 94462631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 172225 = 3668^2 + 415^2 .

It is an emirp because it is prime and its reverse (94462631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13626449 - 2¹⁶ = 13560913 is a prime.

It is a super-2 number, since 2×13626449² = 371360224699202, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 13626451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13626443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6813224 + 6813225.

It is an arithmetic number, because the mean of its divisors is an integer number (6813225).

Almost surely, 2^13626449 is an apocalyptic number.

It is an amenable number.

13626449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13626449 is an equidigital number, since it uses as much as digits as its factorization.

13626449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 13626449 is about 3691.4020371669. The cubic root of 13626449 is about 238.8512756196.

The spelling of 13626449 in words is "thirteen million, six hundred twenty-six thousand, four hundred forty-nine".