68985641 has 4 divisors (see below), whose sum is σ = 69024384. Its totient is φ = 68946900.

The previous prime is 68985619. The next prime is 68985733. The reversal of 68985641 is 14658986.

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 a de Polignac number, because none of the positive numbers 2^k-68985641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68985041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16565 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (17256096).

Almost surely, 2^68985641 is an apocalyptic number.

It is an amenable number.

68985641 is a deficient number, since it is larger than the sum of its proper divisors (38743).

68985641 is a wasteful number, since it uses less digits than its factorization.

68985641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38742.

The product of its digits is 414720, while the sum is 47.

The square root of 68985641 is about 8305.7595077151. The cubic root of 68985641 is about 410.1281396026.

The spelling of 68985641 in words is "sixty-eight million, nine hundred eighty-five thousand, six hundred forty-one".