68889851 has 2 divisors, whose sum is σ = 68889852. Its totient is φ = 68889850.

The previous prime is 68889823. The next prime is 68889857. The reversal of 68889851 is 15898886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68889851 - 2⁶ = 68889787 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 68889793 and 68889802.

It is not a weakly prime, because it can be changed into another prime (68889857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444925 + 34444926.

It is an arithmetic number, because the mean of its divisors is an integer number (34444926).

Almost surely, 2^68889851 is an apocalyptic number.

68889851 is a deficient number, since it is larger than the sum of its proper divisors (1).

68889851 is an equidigital number, since it uses as much as digits as its factorization.

68889851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 53.

The square root of 68889851 is about 8299.9910240915. The cubic root of 68889851 is about 409.9382238870.

The spelling of 68889851 in words is "sixty-eight million, eight hundred eighty-nine thousand, eight hundred fifty-one".