68308837 has 4 divisors (see below), whose sum is σ = 69428716. Its totient is φ = 67188960.

The previous prime is 68308787. The next prime is 68308847. The reversal of 68308837 is 73880386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73880386 = 2 ⋅36940193.

It can be written as a sum of positive squares in 2 ways, for example, as 4532641 + 63776196 = 2129^2 + 7986^2 .

It is a cyclic number.

It is not a de Polignac number, because 68308837 - 2¹¹ = 68306789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68308793 and 68308802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68308847) 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, 559848 + ... + 559969.

It is an arithmetic number, because the mean of its divisors is an integer number (17357179).

Almost surely, 2^68308837 is an apocalyptic number.

It is an amenable number.

68308837 is a deficient number, since it is larger than the sum of its proper divisors (1119879).

68308837 is a wasteful number, since it uses less digits than its factorization.

68308837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119878.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 68308837 is about 8264.9160310314. The cubic root of 68308837 is about 408.7825016318.

The spelling of 68308837 in words is "sixty-eight million, three hundred eight thousand, eight hundred thirty-seven".