61039643 has 6 divisors (see below), whose sum is σ = 71005356. Its totient is φ = 52319652.

The previous prime is 61039637. The next prime is 61039687. The reversal of 61039643 is 34693016.

It is a happy number.

61039643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61039643 - 2⁶ = 61039579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61039633) 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 5 ways as a sum of consecutive naturals, for example, 622805 + ... + 622902.

It is an arithmetic number, because the mean of its divisors is an integer number (11834226).

Almost surely, 2^61039643 is an apocalyptic number.

61039643 is a deficient number, since it is larger than the sum of its proper divisors (9965713).

61039643 is a wasteful number, since it uses less digits than its factorization.

61039643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245721 (or 1245714 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 61039643 is about 7812.7871467230. The cubic root of 61039643 is about 393.7349755584.

The spelling of 61039643 in words is "sixty-one million, thirty-nine thousand, six hundred forty-three".