13660489 has 2 divisors, whose sum is σ = 13660490. Its totient is φ = 13660488.

The previous prime is 13660463. The next prime is 13660499. The reversal of 13660489 is 98406631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 3674889 = 3160^2 + 1917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13660489 is a prime.

It is not a weakly prime, because it can be changed into another prime (13660499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830244 + 6830245.

It is an arithmetic number, because the mean of its divisors is an integer number (6830245).

Almost surely, 2^13660489 is an apocalyptic number.

It is an amenable number.

13660489 is a deficient number, since it is larger than the sum of its proper divisors (1).

13660489 is an equidigital number, since it uses as much as digits as its factorization.

13660489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 13660489 is about 3696.0098755279. The cubic root of 13660489 is about 239.0500003347.

The spelling of 13660489 in words is "thirteen million, six hundred sixty thousand, four hundred eighty-nine".