68643854 has 8 divisors (see below), whose sum is σ = 103622088. Its totient is φ = 34103160.

The previous prime is 68643833. The next prime is 68643857. The reversal of 68643854 is 45834686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643857) 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, 108992 + ... + 109619.

It is an arithmetic number, because the mean of its divisors is an integer number (12952761).

Almost surely, 2^68643854 is an apocalyptic number.

68643854 is a deficient number, since it is larger than the sum of its proper divisors (34978234).

68643854 is a wasteful number, since it uses less digits than its factorization.

68643854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218770.

The product of its digits is 552960, while the sum is 44.

The square root of 68643854 is about 8285.1586587102. The cubic root of 68643854 is about 409.4496959750.

The spelling of 68643854 in words is "sixty-eight million, six hundred forty-three thousand, eight hundred fifty-four".