61105493 has 2 divisors, whose sum is σ = 61105494. Its totient is φ = 61105492.

The previous prime is 61105487. The next prime is 61105507. The reversal of 61105493 is 39450116.

61105493 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 can be written as a sum of positive squares in only one way, i.e., 61105489 + 4 = 7817^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61105493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61105403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30552746 + 30552747.

It is an arithmetic number, because the mean of its divisors is an integer number (30552747).

Almost surely, 2^61105493 is an apocalyptic number.

It is an amenable number.

61105493 is a deficient number, since it is larger than the sum of its proper divisors (1).

61105493 is an equidigital number, since it uses as much as digits as its factorization.

61105493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 61105493 is about 7817.0002558526. Note that the first 3 decimals coincide. The cubic root of 61105493 is about 393.8765127020.

The spelling of 61105493 in words is "sixty-one million, one hundred five thousand, four hundred ninety-three".