13101661 has 2 divisors, whose sum is σ = 13101662. Its totient is φ = 13101660.

The previous prime is 13101643. The next prime is 13101677. The reversal of 13101661 is 16610131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8820900 + 4280761 = 2970^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 13101661 - 2⁵ = 13101629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13101631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6550830 + 6550831.

It is an arithmetic number, because the mean of its divisors is an integer number (6550831).

Almost surely, 2^13101661 is an apocalyptic number.

It is an amenable number.

13101661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13101661 is an equidigital number, since it uses as much as digits as its factorization.

13101661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 13101661 is about 3619.6216653126. The cubic root of 13101661 is about 235.7447985862.

Adding to 13101661 its reverse (16610131), we get a palindrome (29711792).

The spelling of 13101661 in words is "thirteen million, one hundred one thousand, six hundred sixty-one".