68715805 has 4 divisors (see below), whose sum is σ = 82458972. Its totient is φ = 54972640.

The previous prime is 68715733. The next prime is 68715869. The reversal of 68715805 is 50851786.

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 31236921 + 37478884 = 5589^2 + 6122^2 .

It is not a de Polignac number, because 68715805 - 2¹⁹ = 68191517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6871576 + ... + 6871585.

It is an arithmetic number, because the mean of its divisors is an integer number (20614743).

Almost surely, 2^68715805 is an apocalyptic number.

It is an amenable number.

68715805 is a deficient number, since it is larger than the sum of its proper divisors (13743167).

68715805 is a wasteful number, since it uses less digits than its factorization.

68715805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13743166.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 68715805 is about 8289.4996833343. The cubic root of 68715805 is about 409.5927047861.

The spelling of 68715805 in words is "sixty-eight million, seven hundred fifteen thousand, eight hundred five".