61008643 has 2 divisors, whose sum is σ = 61008644. Its totient is φ = 61008642.

The previous prime is 61008613. The next prime is 61008653. The reversal of 61008643 is 34680016.

61008643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61008643 - 2⁵ = 61008611 is a prime.

It is not a weakly prime, because it can be changed into another prime (61008613) 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, 30504321 + 30504322.

It is an arithmetic number, because the mean of its divisors is an integer number (30504322).

Almost surely, 2^61008643 is an apocalyptic number.

61008643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61008643 is an equidigital number, since it uses as much as digits as its factorization.

61008643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 61008643 is about 7810.8029676852. The cubic root of 61008643 is about 393.6683093148.

Adding to 61008643 its reverse (34680016), we get a palindrome (95688659).

The spelling of 61008643 in words is "sixty-one million, eight thousand, six hundred forty-three".