68691841 has 4 divisors (see below), whose sum is σ = 68830000. Its totient is φ = 68553684.

The previous prime is 68691839. The next prime is 68691881. The reversal of 68691841 is 14819686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68691841 - 2¹ = 68691839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68691881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68331 + ... + 69328.

It is an arithmetic number, because the mean of its divisors is an integer number (17207500).

Almost surely, 2^68691841 is an apocalyptic number.

It is an amenable number.

68691841 is a deficient number, since it is larger than the sum of its proper divisors (138159).

68691841 is a wasteful number, since it uses less digits than its factorization.

68691841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138158.

The product of its digits is 82944, while the sum is 43.

The square root of 68691841 is about 8288.0541142056. The cubic root of 68691841 is about 409.5450853637.

The spelling of 68691841 in words is "sixty-eight million, six hundred ninety-one thousand, eight hundred forty-one".