61989937 has 2 divisors, whose sum is σ = 61989938. Its totient is φ = 61989936.

The previous prime is 61989931. The next prime is 61989953. The reversal of 61989937 is 73998916.

61989937 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., 46117681 + 15872256 = 6791^2 + 3984^2 .

It is a cyclic number.

It is not a de Polignac number, because 61989937 - 2³ = 61989929 is a prime.

It is not a weakly prime, because it can be changed into another prime (61989931) 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, 30994968 + 30994969.

It is an arithmetic number, because the mean of its divisors is an integer number (30994969).

Almost surely, 2^61989937 is an apocalyptic number.

It is an amenable number.

61989937 is a deficient number, since it is larger than the sum of its proper divisors (1).

61989937 is an equidigital number, since it uses as much as digits as its factorization.

61989937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 61989937 is about 7873.3688469422. The cubic root of 61989937 is about 395.7677467647.

It can be divided in two parts, 61989 and 937, that added together give a palindrome (62926).

The spelling of 61989937 in words is "sixty-one million, nine hundred eighty-nine thousand, nine hundred thirty-seven".