61107649 has 2 divisors, whose sum is σ = 61107650. Its totient is φ = 61107648.

The previous prime is 61107647. The next prime is 61107653. The reversal of 61107649 is 94670116.

61107649 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., 43467649 + 17640000 = 6593^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 61107649 - 2¹ = 61107647 is a prime.

Together with 61107647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61107647) 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, 30553824 + 30553825.

It is an arithmetic number, because the mean of its divisors is an integer number (30553825).

Almost surely, 2^61107649 is an apocalyptic number.

It is an amenable number.

61107649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61107649 is an equidigital number, since it uses as much as digits as its factorization.

61107649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 61107649 is about 7817.1381591987. The cubic root of 61107649 is about 393.8811450612.

The spelling of 61107649 in words is "sixty-one million, one hundred seven thousand, six hundred forty-nine".