13649953 has 2 divisors, whose sum is σ = 13649954. Its totient is φ = 13649952.

The previous prime is 13649917. The next prime is 13649957. The reversal of 13649953 is 35994631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 1595169 = 3472^2 + 1263^2 .

It is an emirp because it is prime and its reverse (35994631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13649953 is a prime.

It is not a weakly prime, because it can be changed into another prime (13649957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6824976 + 6824977.

It is an arithmetic number, because the mean of its divisors is an integer number (6824977).

Almost surely, 2^13649953 is an apocalyptic number.

It is an amenable number.

13649953 is a deficient number, since it is larger than the sum of its proper divisors (1).

13649953 is an equidigital number, since it uses as much as digits as its factorization.

13649953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 13649953 is about 3694.5842797262. The cubic root of 13649953 is about 238.9885267276.

The spelling of 13649953 in words is "thirteen million, six hundred forty-nine thousand, nine hundred fifty-three".