64012009 has 2 divisors, whose sum is σ = 64012010. Its totient is φ = 64012008.

The previous prime is 64011989. The next prime is 64012033. The reversal of 64012009 is 90021046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45522009 + 18490000 = 6747^2 + 4300^2 .

It is a cyclic number.

It is not a de Polignac number, because 64012009 - 2¹¹ = 64009961 is a prime.

It is not a weakly prime, because it can be changed into another prime (64012049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32006004 + 32006005.

It is an arithmetic number, because the mean of its divisors is an integer number (32006005).

Almost surely, 2^64012009 is an apocalyptic number.

It is an amenable number.

64012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

64012009 is an equidigital number, since it uses as much as digits as its factorization.

64012009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 64012009 is about 8000.7505272943. The cubic root of 64012009 is about 400.0250171853.

The spelling of 64012009 in words is "sixty-four million, twelve thousand, nine".