68646437 has 2 divisors, whose sum is σ = 68646438. Its totient is φ = 68646436.

The previous prime is 68646397. The next prime is 68646463. The reversal of 68646437 is 73464686.

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., 67010596 + 1635841 = 8186^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 68646437 - 2²⁰ = 67597861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68646637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323218 + 34323219.

It is an arithmetic number, because the mean of its divisors is an integer number (34323219).

Almost surely, 2^68646437 is an apocalyptic number.

It is an amenable number.

68646437 is a deficient number, since it is larger than the sum of its proper divisors (1).

68646437 is an equidigital number, since it uses as much as digits as its factorization.

68646437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 44.

The square root of 68646437 is about 8285.3145383866. The cubic root of 68646437 is about 409.4548316389.

The spelling of 68646437 in words is "sixty-eight million, six hundred forty-six thousand, four hundred thirty-seven".