68817394 has 16 divisors (see below), whose sum is σ = 111093336. Its totient is φ = 31852800.

The previous prime is 68817379. The next prime is 68817401. The reversal of 68817394 is 49371886.

68817394 = 1032² + 1033² + ... + 1092².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48233025 + 20584369 = 6945^2 + 4537^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14517 + ... + 18664.

Almost surely, 2^68817394 is an apocalyptic number.

68817394 is a deficient number, since it is larger than the sum of its proper divisors (42275942).

68817394 is a wasteful number, since it uses less digits than its factorization.

68817394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33261.

The product of its digits is 290304, while the sum is 46.

The square root of 68817394 is about 8295.6249915241. The cubic root of 68817394 is about 409.7944517968.

The spelling of 68817394 in words is "sixty-eight million, eight hundred seventeen thousand, three hundred ninety-four".