13660403 has 2 divisors, whose sum is σ = 13660404. Its totient is φ = 13660402.

The previous prime is 13660399. The next prime is 13660441. The reversal of 13660403 is 30406631.

13660403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13660403 - 2² = 13660399 is a prime.

It is a super-2 number, since 2×13660403² = 373213220244818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13660453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830201 + 6830202.

It is an arithmetic number, because the mean of its divisors is an integer number (6830202).

Almost surely, 2^13660403 is an apocalyptic number.

13660403 is a deficient number, since it is larger than the sum of its proper divisors (1).

13660403 is an equidigital number, since it uses as much as digits as its factorization.

13660403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 13660403 is about 3695.9982413416. The cubic root of 13660403 is about 239.0494986849.

The spelling of 13660403 in words is "thirteen million, six hundred sixty thousand, four hundred three".