61727749 has 2 divisors, whose sum is σ = 61727750. Its totient is φ = 61727748.

The previous prime is 61727741. The next prime is 61727759. The reversal of 61727749 is 94772716.

61727749 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., 50552100 + 11175649 = 7110^2 + 3343^2 .

It is a cyclic number.

It is not a de Polignac number, because 61727749 - 2³ = 61727741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61727741) 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, 30863874 + 30863875.

It is an arithmetic number, because the mean of its divisors is an integer number (30863875).

Almost surely, 2^61727749 is an apocalyptic number.

It is an amenable number.

61727749 is a deficient number, since it is larger than the sum of its proper divisors (1).

61727749 is an equidigital number, since it uses as much as digits as its factorization.

61727749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 43.

The square root of 61727749 is about 7856.7008979597. The cubic root of 61727749 is about 395.2089883772.

The spelling of 61727749 in words is "sixty-one million, seven hundred twenty-seven thousand, seven hundred forty-nine".