64900729 has 2 divisors, whose sum is σ = 64900730. Its totient is φ = 64900728.

The previous prime is 64900727. The next prime is 64900741. The reversal of 64900729 is 92700946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57032704 + 7868025 = 7552^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 64900729 - 2¹ = 64900727 is a prime.

Together with 64900727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64900727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32450364 + 32450365.

It is an arithmetic number, because the mean of its divisors is an integer number (32450365).

Almost surely, 2^64900729 is an apocalyptic number.

It is an amenable number.

64900729 is a deficient number, since it is larger than the sum of its proper divisors (1).

64900729 is an equidigital number, since it uses as much as digits as its factorization.

64900729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 64900729 is about 8056.0988698004. The cubic root of 64900729 is about 401.8677836358.

The spelling of 64900729 in words is "sixty-four million, nine hundred thousand, seven hundred twenty-nine".