64701961 has 2 divisors, whose sum is σ = 64701962. Its totient is φ = 64701960.

The previous prime is 64701943. The next prime is 64701997. The reversal of 64701961 is 16910746.

64701961 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., 39300361 + 25401600 = 6269^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 64701961 - 2²¹ = 62604809 is a prime.

It is not a weakly prime, because it can be changed into another prime (64701361) 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, 32350980 + 32350981.

It is an arithmetic number, because the mean of its divisors is an integer number (32350981).

Almost surely, 2^64701961 is an apocalyptic number.

It is an amenable number.

64701961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64701961 is an equidigital number, since it uses as much as digits as its factorization.

64701961 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 64701961 is about 8043.7529176374. The cubic root of 64701961 is about 401.4571044216.

The spelling of 64701961 in words is "sixty-four million, seven hundred one thousand, nine hundred sixty-one".