13551869 has 2 divisors, whose sum is σ = 13551870. Its totient is φ = 13551868.

The previous prime is 13551859. The next prime is 13551913. The reversal of 13551869 is 96815531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 1923769 = 3410^2 + 1387^2 .

It is an emirp because it is prime and its reverse (96815531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13551869 - 2¹² = 13547773 is a prime.

It is a super-2 number, since 2×13551869² = 367306306786322, 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 (13551809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775934 + 6775935.

It is an arithmetic number, because the mean of its divisors is an integer number (6775935).

Almost surely, 2^13551869 is an apocalyptic number.

It is an amenable number.

13551869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551869 is an equidigital number, since it uses as much as digits as its factorization.

13551869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 13551869 is about 3681.2863240992. The cubic root of 13551869 is about 238.4147195711.

The spelling of 13551869 in words is "thirteen million, five hundred fifty-one thousand, eight hundred sixty-nine".