68395805 has 4 divisors (see below), whose sum is σ = 82074972. Its totient is φ = 54716640.

The previous prime is 68395783. The next prime is 68395807. The reversal of 68395805 is 50859386.

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 28793956 + 39601849 = 5366^2 + 6293^2 .

It is not a de Polignac number, because 68395805 - 2¹⁸ = 68133661 is a prime.

It is a super-2 number, since 2×68395805² = 9355972283196050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68395807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6839576 + ... + 6839585.

It is an arithmetic number, because the mean of its divisors is an integer number (20518743).

Almost surely, 2^68395805 is an apocalyptic number.

It is an amenable number.

68395805 is a deficient number, since it is larger than the sum of its proper divisors (13679167).

68395805 is a wasteful number, since it uses less digits than its factorization.

68395805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13679166.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 68395805 is about 8270.1756329597. The cubic root of 68395805 is about 408.9559097464.

The spelling of 68395805 in words is "sixty-eight million, three hundred ninety-five thousand, eight hundred five".