64205623 has 8 divisors (see below), whose sum is σ = 66520080. Its totient is φ = 61897920.

The previous prime is 64205597. The next prime is 64205641. The reversal of 64205623 is 32650246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64205623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64205591 and 64205600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64205683) 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 in 7 ways as a sum of consecutive naturals, for example, 25083 + ... + 27523.

It is an arithmetic number, because the mean of its divisors is an integer number (8315010).

Almost surely, 2^64205623 is an apocalyptic number.

64205623 is a deficient number, since it is larger than the sum of its proper divisors (2314457).

64205623 is a wasteful number, since it uses less digits than its factorization.

64205623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 64205623 is about 8012.8411315837. The cubic root of 64205623 is about 400.4279232909.

Adding to 64205623 its reverse (32650246), we get a palindrome (96855869).

The spelling of 64205623 in words is "sixty-four million, two hundred five thousand, six hundred twenty-three".