13661403 has 8 divisors (see below), whose sum is σ = 20817408. Its totient is φ = 7806504.

The previous prime is 13661369. The next prime is 13661419. The reversal of 13661403 is 30416631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13661403 - 2⁶ = 13661339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13661003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325251 + ... + 325292.

It is an arithmetic number, because the mean of its divisors is an integer number (2602176).

Almost surely, 2^13661403 is an apocalyptic number.

13661403 is a deficient number, since it is larger than the sum of its proper divisors (7156005).

13661403 is an equidigital number, since it uses as much as digits as its factorization.

13661403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650553.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 13661403 is about 3696.1335203155. The cubic root of 13661403 is about 239.0553316916.

The spelling of 13661403 in words is "thirteen million, six hundred sixty-one thousand, four hundred three".