68918751 has 12 divisors (see below), whose sum is σ = 108599400. Its totient is φ = 41768880.

The previous prime is 68918747. The next prime is 68918771. The reversal of 68918751 is 15781986.

It is not a de Polignac number, because 68918751 - 2² = 68918747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68918697 and 68918706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68918701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347976 + ... + 348173.

It is an arithmetic number, because the mean of its divisors is an integer number (9049950).

Almost surely, 2^68918751 is an apocalyptic number.

68918751 is a deficient number, since it is larger than the sum of its proper divisors (39680649).

68918751 is a wasteful number, since it uses less digits than its factorization.

68918751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696166 (or 696163 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 68918751 is about 8301.7318072797. The cubic root of 68918751 is about 409.9955403045.

It can be divided in two parts, 68 and 918751, that added together give a palindrome (918819).

The spelling of 68918751 in words is "sixty-eight million, nine hundred eighteen thousand, seven hundred fifty-one".