64108993 has 4 divisors (see below), whose sum is σ = 69040468. Its totient is φ = 59177520.

The previous prime is 64108991. The next prime is 64109009. The reversal of 64108993 is 39980146.

64108993 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.

It can be written as a sum of positive squares in 2 ways, for example, as 37307664 + 26801329 = 6108^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 64108993 - 2¹ = 64108991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64108991) 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, 2465718 + ... + 2465743.

It is an arithmetic number, because the mean of its divisors is an integer number (17260117).

Almost surely, 2^64108993 is an apocalyptic number.

It is an amenable number.

64108993 is a deficient number, since it is larger than the sum of its proper divisors (4931475).

64108993 is a wasteful number, since it uses less digits than its factorization.

64108993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931474.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 64108993 is about 8006.8091647048. The cubic root of 64108993 is about 400.2269399713.

The spelling of 64108993 in words is "sixty-four million, one hundred eight thousand, nine hundred ninety-three".