64009705 has 16 divisors (see below), whose sum is σ = 77988240. Its totient is φ = 50429952.

The previous prime is 64009669. The next prime is 64009717. The reversal of 64009705 is 50790046.

It can be written as a sum of positive squares in 8 ways, for example, as 18352656 + 45657049 = 4284^2 + 6757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64009705 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139837 + ... + 140293.

It is an arithmetic number, because the mean of its divisors is an integer number (4874265).

Almost surely, 2^64009705 is an apocalyptic number.

It is an amenable number.

64009705 is a deficient number, since it is larger than the sum of its proper divisors (13978535).

64009705 is a wasteful number, since it uses less digits than its factorization.

64009705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 64009705 is about 8000.6065395069. The cubic root of 64009705 is about 400.0202177281.

The spelling of 64009705 in words is "sixty-four million, nine thousand, seven hundred five".