64728089 has 2 divisors, whose sum is σ = 64728090. Its totient is φ = 64728088.

The previous prime is 64728067. The next prime is 64728101. The reversal of 64728089 is 98082746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62932489 + 1795600 = 7933^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 64728089 - 2⁸ = 64727833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64728019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32364044 + 32364045.

It is an arithmetic number, because the mean of its divisors is an integer number (32364045).

Almost surely, 2^64728089 is an apocalyptic number.

It is an amenable number.

64728089 is a deficient number, since it is larger than the sum of its proper divisors (1).

64728089 is an equidigital number, since it uses as much as digits as its factorization.

64728089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 64728089 is about 8045.3768712224. The cubic root of 64728089 is about 401.5111360638.

The spelling of 64728089 in words is "sixty-four million, seven hundred twenty-eight thousand, eighty-nine".