68238437 has 4 divisors (see below), whose sum is σ = 68268876. Its totient is φ = 68208000.

The previous prime is 68238419. The next prime is 68238439. The reversal of 68238437 is 73483286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73483286 = 2 ⋅36741643.

It can be written as a sum of positive squares in 2 ways, for example, as 56942116 + 11296321 = 7546^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 68238437 - 2¹⁰ = 68237413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68238394 and 68238403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68238439) 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 3 ways as a sum of consecutive naturals, for example, 11564 + ... + 16437.

It is an arithmetic number, because the mean of its divisors is an integer number (17067219).

Almost surely, 2^68238437 is an apocalyptic number.

It is an amenable number.

68238437 is a deficient number, since it is larger than the sum of its proper divisors (30439).

68238437 is a wasteful number, since it uses less digits than its factorization.

68238437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30438.

The product of its digits is 193536, while the sum is 41.

The square root of 68238437 is about 8260.6559666893. The cubic root of 68238437 is about 408.6420211245.

The spelling of 68238437 in words is "sixty-eight million, two hundred thirty-eight thousand, four hundred thirty-seven".