68888999 has 2 divisors, whose sum is σ = 68889000. Its totient is φ = 68888998.

The previous prime is 68888977. The next prime is 68889019. The reversal of 68888999 is 99988886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68888999 - 2¹² = 68884903 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68888929) 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 as a sum of consecutive naturals, namely, 34444499 + 34444500.

It is an arithmetic number, because the mean of its divisors is an integer number (34444500).

Almost surely, 2^68888999 is an apocalyptic number.

68888999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68888999 is an equidigital number, since it uses as much as digits as its factorization.

68888999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 65.

The square root of 68888999 is about 8299.9396985761. The cubic root of 68888999 is about 409.9365339002.

The spelling of 68888999 in words is "sixty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-nine".