68724817 has 8 divisors (see below), whose sum is σ = 79117056. Its totient is φ = 58476192.

The previous prime is 68724811. The next prime is 68724833. The reversal of 68724817 is 71842786.

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

It is a cyclic number.

It is not a de Polignac number, because 68724817 - 2¹⁹ = 68200529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68724811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34873 + ... + 36790.

It is an arithmetic number, because the mean of its divisors is an integer number (9889632).

Almost surely, 2^68724817 is an apocalyptic number.

It is an amenable number.

68724817 is a deficient number, since it is larger than the sum of its proper divisors (10392239).

68724817 is a wasteful number, since it uses less digits than its factorization.

68724817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71807.

The product of its digits is 150528, while the sum is 43.

The square root of 68724817 is about 8290.0432447605. The cubic root of 68724817 is about 409.6106098765.

It can be divided in two parts, 68 and 724817, that multiplied together give a triangular number (49287556 = T₉₉₂₈).

The spelling of 68724817 in words is "sixty-eight million, seven hundred twenty-four thousand, eight hundred seventeen".