64689193 has 4 divisors (see below), whose sum is σ = 65785680. Its totient is φ = 63592708.

The previous prime is 64689151. The next prime is 64689257. The reversal of 64689193 is 39198646.

64689193 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64689193 - 2⁹ = 64688681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64689113) 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, 548155 + ... + 548272.

It is an arithmetic number, because the mean of its divisors is an integer number (16446420).

Almost surely, 2^64689193 is an apocalyptic number.

It is an amenable number.

64689193 is a deficient number, since it is larger than the sum of its proper divisors (1096487).

64689193 is a wasteful number, since it uses less digits than its factorization.

64689193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096486.

The product of its digits is 279936, while the sum is 46.

The square root of 64689193 is about 8042.9592190934. The cubic root of 64689193 is about 401.4306954255.

The spelling of 64689193 in words is "sixty-four million, six hundred eighty-nine thousand, one hundred ninety-three".