68985643 has 8 divisors (see below), whose sum is σ = 73511712. Its totient is φ = 64511616.

The previous prime is 68985619. The next prime is 68985733. The reversal of 68985643 is 34658986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68985643 - 2¹³ = 68977451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68985043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10255 + ... + 15592.

It is an arithmetic number, because the mean of its divisors is an integer number (9188964).

Almost surely, 2^68985643 is an apocalyptic number.

68985643 is a deficient number, since it is larger than the sum of its proper divisors (4526069).

68985643 is a wasteful number, since it uses less digits than its factorization.

68985643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26021.

The product of its digits is 1244160, while the sum is 49.

The square root of 68985643 is about 8305.7596281135. The cubic root of 68985643 is about 410.1281435660.

The spelling of 68985643 in words is "sixty-eight million, nine hundred eighty-five thousand, six hundred forty-three".