61108613 has 2 divisors, whose sum is σ = 61108614. Its totient is φ = 61108612.

The previous prime is 61108589. The next prime is 61108661. The reversal of 61108613 is 31680116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53479969 + 7628644 = 7313^2 + 2762^2 .

It is a cyclic number.

It is not a de Polignac number, because 61108613 - 2⁸ = 61108357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61108673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30554306 + 30554307.

It is an arithmetic number, because the mean of its divisors is an integer number (30554307).

Almost surely, 2^61108613 is an apocalyptic number.

It is an amenable number.

61108613 is a deficient number, since it is larger than the sum of its proper divisors (1).

61108613 is an equidigital number, since it uses as much as digits as its factorization.

61108613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 61108613 is about 7817.1998183493. The cubic root of 61108613 is about 393.8832162663.

Adding to 61108613 its reverse (31680116), we get a palindrome (92788729).

The spelling of 61108613 in words is "sixty-one million, one hundred eight thousand, six hundred thirteen".