61739797 has 16 divisors (see below), whose sum is σ = 77506560. Its totient is φ = 47952432.

The previous prime is 61739771. The next prime is 61739803. The reversal of 61739797 is 79793716.

61739797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61739797 - 2¹¹ = 61737749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61739797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61739707) 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 15 ways as a sum of consecutive naturals, for example, 7033 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (4844160).

Almost surely, 2^61739797 is an apocalyptic number.

It is an amenable number.

61739797 is a deficient number, since it is larger than the sum of its proper divisors (15766763).

61739797 is a wasteful number, since it uses less digits than its factorization.

61739797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232.

The product of its digits is 500094, while the sum is 49.

The square root of 61739797 is about 7857.4675945880. The cubic root of 61739797 is about 395.2346989542.

The spelling of 61739797 in words is "sixty-one million, seven hundred thirty-nine thousand, seven hundred ninety-seven".