68942641 has 2 divisors, whose sum is σ = 68942642. Its totient is φ = 68942640.

The previous prime is 68942639. The next prime is 68942663. The reversal of 68942641 is 14624986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68823616 + 119025 = 8296^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 68942641 - 2¹ = 68942639 is a prime.

Together with 68942639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 68942594 and 68942603.

It is not a weakly prime, because it can be changed into another prime (68942141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34471320 + 34471321.

It is an arithmetic number, because the mean of its divisors is an integer number (34471321).

Almost surely, 2^68942641 is an apocalyptic number.

It is an amenable number.

68942641 is a deficient number, since it is larger than the sum of its proper divisors (1).

68942641 is an equidigital number, since it uses as much as digits as its factorization.

68942641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 68942641 is about 8303.1705390170. The cubic root of 68942641 is about 410.0429084579.

The spelling of 68942641 in words is "sixty-eight million, nine hundred forty-two thousand, six hundred forty-one".