68353687 has 4 divisors (see below), whose sum is σ = 68468400. Its totient is φ = 68238976.

The previous prime is 68353679. The next prime is 68353699. The reversal of 68353687 is 78635386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78635386 = 2 ⋅39317693.

It is a cyclic number.

It is not a de Polignac number, because 68353687 - 2³ = 68353679 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 (68353657) 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, 56458 + ... + 57655.

It is an arithmetic number, because the mean of its divisors is an integer number (17117100).

Almost surely, 2^68353687 is an apocalyptic number.

68353687 is a deficient number, since it is larger than the sum of its proper divisors (114713).

68353687 is a wasteful number, since it uses less digits than its factorization.

68353687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114712.

The product of its digits is 725760, while the sum is 46.

The square root of 68353687 is about 8267.6288620136. The cubic root of 68353687 is about 408.8719477656.

The spelling of 68353687 in words is "sixty-eight million, three hundred fifty-three thousand, six hundred eighty-seven".