13603969 has 2 divisors, whose sum is σ = 13603970. Its totient is φ = 13603968.

The previous prime is 13603937. The next prime is 13603979. The reversal of 13603969 is 96930631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13593969 + 10000 = 3687^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 13603969 - 2⁵ = 13603937 is a prime.

It is a super-2 number, since 2×13603969² = 370135945105922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13603979) 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 as a sum of consecutive naturals, namely, 6801984 + 6801985.

It is an arithmetic number, because the mean of its divisors is an integer number (6801985).

Almost surely, 2^13603969 is an apocalyptic number.

It is an amenable number.

13603969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13603969 is an equidigital number, since it uses as much as digits as its factorization.

13603969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 13603969 is about 3688.3558667786. The cubic root of 13603969 is about 238.7198563956.

It can be divided in two parts, 1360 and 3969, that added together give a square (5329 = 73²).

The spelling of 13603969 in words is "thirteen million, six hundred three thousand, nine hundred sixty-nine".