61059905 has 4 divisors (see below), whose sum is σ = 73271892. Its totient is φ = 48847920.

The previous prime is 61059893. The next prime is 61059907. The reversal of 61059905 is 50995016.

61059905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 42406144 = 4319^2 + 6512^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61059905 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61059907) 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 in 3 ways as a sum of consecutive naturals, for example, 6105986 + ... + 6105995.

It is an arithmetic number, because the mean of its divisors is an integer number (18317973).

Almost surely, 2^61059905 is an apocalyptic number.

It is an amenable number.

61059905 is a deficient number, since it is larger than the sum of its proper divisors (12211987).

61059905 is a wasteful number, since it uses less digits than its factorization.

61059905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12211986.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 61059905 is about 7814.0837594692. The cubic root of 61059905 is about 393.7785372783.

The spelling of 61059905 in words is "sixty-one million, fifty-nine thousand, nine hundred five".