68758715 has 4 divisors (see below), whose sum is σ = 82510464. Its totient is φ = 55006968.

The previous prime is 68758673. The next prime is 68758717. The reversal of 68758715 is 51785786.

It is a happy number.

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 68758715 - 2¹⁰ = 68757691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68758715.

It is not an unprimeable number, because it can be changed into a prime (68758717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6875867 + ... + 6875876.

It is an arithmetic number, because the mean of its divisors is an integer number (20627616).

Almost surely, 2^68758715 is an apocalyptic number.

68758715 is a deficient number, since it is larger than the sum of its proper divisors (13751749).

68758715 is a wasteful number, since it uses less digits than its factorization.

68758715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751748.

The product of its digits is 470400, while the sum is 47.

The square root of 68758715 is about 8292.0874935085. The cubic root of 68758715 is about 409.6779445929.

The spelling of 68758715 in words is "sixty-eight million, seven hundred fifty-eight thousand, seven hundred fifteen".