68321437 has 2 divisors, whose sum is σ = 68321438. Its totient is φ = 68321436.

The previous prime is 68321423. The next prime is 68321443. The reversal of 68321437 is 73412386.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49477156 + 18844281 = 7034^2 + 4341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68321437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68321467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34160718 + 34160719.

It is an arithmetic number, because the mean of its divisors is an integer number (34160719).

Almost surely, 2^68321437 is an apocalyptic number.

It is an amenable number.

68321437 is a deficient number, since it is larger than the sum of its proper divisors (1).

68321437 is an equidigital number, since it uses as much as digits as its factorization.

68321437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 68321437 is about 8265.6782540818. The cubic root of 68321437 is about 408.8076342651.

The spelling of 68321437 in words is "sixty-eight million, three hundred twenty-one thousand, four hundred thirty-seven".