64878093 has 24 divisors (see below), whose sum is σ = 108575168. Its totient is φ = 36562752.

The previous prime is 64878091. The next prime is 64878097. The reversal of 64878093 is 39087846.

It is a happy number.

64878093 is a `hidden beast` number, since 6 + 487 + 80 + 93 = 666.

It is not a de Polignac number, because 64878093 - 2¹ = 64878091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878091) 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 23 ways as a sum of consecutive naturals, for example, 2455 + ... + 11652.

Almost surely, 2^64878093 is an apocalyptic number.

64878093 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64878093 is a deficient number, since it is larger than the sum of its proper divisors (43697075).

64878093 is a wasteful number, since it uses less digits than its factorization.

64878093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14193 (or 14190 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 64878093 is about 8054.6938489306. The cubic root of 64878093 is about 401.8210572118.

The spelling of 64878093 in words is "sixty-four million, eight hundred seventy-eight thousand, ninety-three".