68278867 has 4 divisors (see below), whose sum is σ = 68335920. Its totient is φ = 68221816.

The previous prime is 68278849. The next prime is 68278877. The reversal of 68278867 is 76887286.

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 68278867 - 2¹⁹ = 67754579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68278807) 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, 26692 + ... + 29137.

It is an arithmetic number, because the mean of its divisors is an integer number (17083980).

Almost surely, 2^68278867 is an apocalyptic number.

68278867 is a deficient number, since it is larger than the sum of its proper divisors (57053).

68278867 is a wasteful number, since it uses less digits than its factorization.

68278867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57052.

The product of its digits is 1806336, while the sum is 52.

The square root of 68278867 is about 8263.1027465474. The cubic root of 68278867 is about 408.7227094474.

The spelling of 68278867 in words is "sixty-eight million, two hundred seventy-eight thousand, eight hundred sixty-seven".