68713237 has 4 divisors (see below), whose sum is σ = 68930316. Its totient is φ = 68496160.

The previous prime is 68713219. The next prime is 68713241. The reversal of 68713237 is 73231786.

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 5574321 + 63138916 = 2361^2 + 7946^2 .

It is a cyclic number.

It is not a de Polignac number, because 68713237 - 2²³ = 60324629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68713196 and 68713205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68713207) 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, 108064 + ... + 108697.

It is an arithmetic number, because the mean of its divisors is an integer number (17232579).

Almost surely, 2^68713237 is an apocalyptic number.

It is an amenable number.

68713237 is a deficient number, since it is larger than the sum of its proper divisors (217079).

68713237 is a wasteful number, since it uses less digits than its factorization.

68713237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217078.

The product of its digits is 42336, while the sum is 37.

The square root of 68713237 is about 8289.3447871349. The cubic root of 68713237 is about 409.5876023832.

It can be divided in two parts, 687 and 13237, that added together give a square (13924 = 118²).

The spelling of 68713237 in words is "sixty-eight million, seven hundred thirteen thousand, two hundred thirty-seven".