64703641 has 2 divisors, whose sum is σ = 64703642. Its totient is φ = 64703640.

The previous prime is 64703633. The next prime is 64703657. The reversal of 64703641 is 14630746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 19545241 = 6720^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 64703641 - 2³ = 64703633 is a prime.

It is a super-2 number, since 2×64703641² = 8373122317313762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64703621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32351820 + 32351821.

It is an arithmetic number, because the mean of its divisors is an integer number (32351821).

Almost surely, 2^64703641 is an apocalyptic number.

It is an amenable number.

64703641 is a deficient number, since it is larger than the sum of its proper divisors (1).

64703641 is an equidigital number, since it uses as much as digits as its factorization.

64703641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 64703641 is about 8043.8573458261. The cubic root of 64703641 is about 401.4605790309.

The spelling of 64703641 in words is "sixty-four million, seven hundred three thousand, six hundred forty-one".