61030643 has 2 divisors, whose sum is σ = 61030644. Its totient is φ = 61030642.

The previous prime is 61030639. The next prime is 61030657. The reversal of 61030643 is 34603016.

61030643 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 is a cyclic number.

It is not a de Polignac number, because 61030643 - 2² = 61030639 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61030243) 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, 30515321 + 30515322.

It is an arithmetic number, because the mean of its divisors is an integer number (30515322).

Almost surely, 2^61030643 is an apocalyptic number.

61030643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61030643 is an equidigital number, since it uses as much as digits as its factorization.

61030643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 61030643 is about 7812.2111466601. The cubic root of 61030643 is about 393.7156231683.

Adding to 61030643 its reverse (34603016), we get a palindrome (95633659).

The spelling of 61030643 in words is "sixty-one million, thirty thousand, six hundred forty-three".