68355813 has 32 divisors (see below), whose sum is σ = 98035200. Its totient is φ = 42287616.

The previous prime is 68355811. The next prime is 68355817. The reversal of 68355813 is 31855386.

It is not a de Polignac number, because 68355813 - 2¹ = 68355811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68355811) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 298383 + ... + 298611.

It is an arithmetic number, because the mean of its divisors is an integer number (3063600).

Almost surely, 2^68355813 is an apocalyptic number.

It is an amenable number.

68355813 is a deficient number, since it is larger than the sum of its proper divisors (29679387).

68355813 is a wasteful number, since it uses less digits than its factorization.

68355813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its digits is 86400, while the sum is 39.

The square root of 68355813 is about 8267.7574347582. The cubic root of 68355813 is about 408.8761867603.

The spelling of 68355813 in words is "sixty-eight million, three hundred fifty-five thousand, eight hundred thirteen".