68864387 has 4 divisors (see below), whose sum is σ = 70031640. Its totient is φ = 67697136.

The previous prime is 68864381. The next prime is 68864413. The reversal of 68864387 is 78346886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78346886 = 2 ⋅39173443.

It is a cyclic number.

It is not a de Polignac number, because 68864387 - 2¹² = 68860291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68864381) 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, 583538 + ... + 583655.

It is an arithmetic number, because the mean of its divisors is an integer number (17507910).

Almost surely, 2^68864387 is an apocalyptic number.

68864387 is a deficient number, since it is larger than the sum of its proper divisors (1167253).

68864387 is a wasteful number, since it uses less digits than its factorization.

68864387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167252.

The product of its digits is 1548288, while the sum is 50.

The square root of 68864387 is about 8298.4569047504. The cubic root of 68864387 is about 409.8877086891.

The spelling of 68864387 in words is "sixty-eight million, eight hundred sixty-four thousand, three hundred eighty-seven".