64605893 has 12 divisors (see below), whose sum is σ = 72185484. Its totient is φ = 57763200.

The previous prime is 64605883. The next prime is 64605913. The reversal of 64605893 is 39850646.

It can be written as a sum of positive squares in 2 ways, for example, as 26388769 + 38217124 = 5137^2 + 6182^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64605893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64605893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64605883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3005 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (6015457).

Almost surely, 2^64605893 is an apocalyptic number.

It is an amenable number.

64605893 is a deficient number, since it is larger than the sum of its proper divisors (7579591).

64605893 is a wasteful number, since it uses less digits than its factorization.

64605893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836 (or 8825 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 64605893 is about 8037.7791086842. The cubic root of 64605893 is about 401.2583145439.

The spelling of 64605893 in words is "sixty-four million, six hundred five thousand, eight hundred ninety-three".