68224687 has 4 divisors (see below), whose sum is σ = 71815480. Its totient is φ = 64633896.

The previous prime is 68224679. The next prime is 68224729. The reversal of 68224687 is 78642286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78642286 = 2 ⋅39321143.

It is not a de Polignac number, because 68224687 - 2³ = 68224679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68224487) 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, 1795368 + ... + 1795405.

It is an arithmetic number, because the mean of its divisors is an integer number (17953870).

Almost surely, 2^68224687 is an apocalyptic number.

68224687 is a deficient number, since it is larger than the sum of its proper divisors (3590793).

68224687 is a wasteful number, since it uses less digits than its factorization.

68224687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590792.

The product of its digits is 258048, while the sum is 43.

The square root of 68224687 is about 8259.8236663987. The cubic root of 68224687 is about 408.6145722483.

The spelling of 68224687 in words is "sixty-eight million, two hundred twenty-four thousand, six hundred eighty-seven".