65039972 has 6 divisors (see below), whose sum is σ = 113819958. Its totient is φ = 32519984.

The previous prime is 65039971. The next prime is 65039999. The reversal of 65039972 is 27993056.

65039972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 64866916 + 173056 = 8054^2 + 416^2 .

It is not an unprimeable number, because it can be changed into a prime (65039971) 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, 8129993 + ... + 8130000.

It is an arithmetic number, because the mean of its divisors is an integer number (18969993).

Almost surely, 2^65039972 is an apocalyptic number.

It is an amenable number.

65039972 is a deficient number, since it is larger than the sum of its proper divisors (48779986).

65039972 is a wasteful number, since it uses less digits than its factorization.

65039972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16259997 (or 16259995 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 65039972 is about 8064.7363255100. The cubic root of 65039972 is about 402.1549776624.

The spelling of 65039972 in words is "sixty-five million, thirty-nine thousand, nine hundred seventy-two".