68689851 has 4 divisors (see below), whose sum is σ = 91586472. Its totient is φ = 45793232.

The previous prime is 68689849. The next prime is 68689867. The reversal of 68689851 is 15898686.

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 68689851 - 2¹ = 68689849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68689794 and 68689803.

It is not an unprimeable number, because it can be changed into a prime (68689051) 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, 11448306 + ... + 11448311.

It is an arithmetic number, because the mean of its divisors is an integer number (22896618).

Almost surely, 2^68689851 is an apocalyptic number.

68689851 is a deficient number, since it is larger than the sum of its proper divisors (22896621).

68689851 is a wasteful number, since it uses less digits than its factorization.

68689851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22896620.

The product of its digits is 829440, while the sum is 51.

The square root of 68689851 is about 8287.9340610311. The cubic root of 68689851 is about 409.5411304904.

The spelling of 68689851 in words is "sixty-eight million, six hundred eighty-nine thousand, eight hundred fifty-one".