13504661 has 2 divisors, whose sum is σ = 13504662. Its totient is φ = 13504660.

The previous prime is 13504643. The next prime is 13504679. The reversal of 13504661 is 16640531.

It is a balanced prime because it is at equal distance from previous prime (13504643) and next prime (13504679).

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 1739761 = 3430^2 + 1319^2 .

It is an emirp because it is prime and its reverse (16640531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13504661 - 2⁶ = 13504597 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13504661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13504861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752330 + 6752331.

It is an arithmetic number, because the mean of its divisors is an integer number (6752331).

Almost surely, 2^13504661 is an apocalyptic number.

It is an amenable number.

13504661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13504661 is an equidigital number, since it uses as much as digits as its factorization.

13504661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13504661 is about 3674.8688411969. The cubic root of 13504661 is about 238.1375578877.

The spelling of 13504661 in words is "thirteen million, five hundred four thousand, six hundred sixty-one".