68393641 has 2 divisors, whose sum is σ = 68393642. Its totient is φ = 68393640.

The previous prime is 68393639. The next prime is 68393671. The reversal of 68393641 is 14639386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 4713241 = 7980^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 68393641 - 2¹ = 68393639 is a prime.

Together with 68393639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68393594 and 68393603.

It is not a weakly prime, because it can be changed into another prime (68393621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34196820 + 34196821.

It is an arithmetic number, because the mean of its divisors is an integer number (34196821).

Almost surely, 2^68393641 is an apocalyptic number.

It is an amenable number.

68393641 is a deficient number, since it is larger than the sum of its proper divisors (1).

68393641 is an equidigital number, since it uses as much as digits as its factorization.

68393641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 68393641 is about 8270.0448003623. The cubic root of 68393641 is about 408.9515966655.

The spelling of 68393641 in words is "sixty-eight million, three hundred ninety-three thousand, six hundred forty-one".