64021603 has 4 divisors (see below), whose sum is σ = 66086848. Its totient is φ = 61956360.

The previous prime is 64021579. The next prime is 64021613. The reversal of 64021603 is 30612046.

64021603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30612046 = 2 ⋅15306023.

It is a cyclic number.

It is not a de Polignac number, because 64021603 - 2⁵ = 64021571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64021613) 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 3 ways as a sum of consecutive naturals, for example, 1032576 + ... + 1032637.

It is an arithmetic number, because the mean of its divisors is an integer number (16521712).

Almost surely, 2^64021603 is an apocalyptic number.

64021603 is a deficient number, since it is larger than the sum of its proper divisors (2065245).

64021603 is a wasteful number, since it uses less digits than its factorization.

64021603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065244.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 64021603 is about 8001.3500735813. The cubic root of 64021603 is about 400.0450011870.

Adding to 64021603 its reverse (30612046), we get a palindrome (94633649).

The spelling of 64021603 in words is "sixty-four million, twenty-one thousand, six hundred three".