64623705 has 16 divisors (see below), whose sum is σ = 105094464. Its totient is φ = 33900480.

The previous prime is 64623679. The next prime is 64623707. The reversal of 64623705 is 50732646.

64623705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64623705 - 2⁵ = 64623673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64623707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34399 + ... + 36228.

It is an arithmetic number, because the mean of its divisors is an integer number (6568404).

Almost surely, 2^64623705 is an apocalyptic number.

It is an amenable number.

64623705 is a deficient number, since it is larger than the sum of its proper divisors (40470759).

64623705 is a wasteful number, since it uses less digits than its factorization.

64623705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70696.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 64623705 is about 8038.8870498347. The cubic root of 64623705 is about 401.2951871161.

The spelling of 64623705 in words is "sixty-four million, six hundred twenty-three thousand, seven hundred five".