68974643 has 4 divisors (see below), whose sum is σ = 69237168. Its totient is φ = 68712120.

The previous prime is 68974637. The next prime is 68974651. The reversal of 68974643 is 34647986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68974643 - 2⁸ = 68974387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68974603) 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, 130868 + ... + 131393.

It is an arithmetic number, because the mean of its divisors is an integer number (17309292).

Almost surely, 2^68974643 is an apocalyptic number.

68974643 is a deficient number, since it is larger than the sum of its proper divisors (262525).

68974643 is a wasteful number, since it uses less digits than its factorization.

68974643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262524.

The product of its digits is 870912, while the sum is 47.

The square root of 68974643 is about 8305.0974106268. The cubic root of 68974643 is about 410.1063436224.

The spelling of 68974643 in words is "sixty-eight million, nine hundred seventy-four thousand, six hundred forty-three".