68889899 has 16 divisors (see below), whose sum is σ = 81974592. Its totient is φ = 57243648.

The previous prime is 68889857. The next prime is 68889911. The reversal of 68889899 is 99898886.

It is a cyclic number.

It is not a de Polignac number, because 68889899 - 2⁸ = 68889643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68880899) 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 in 15 ways as a sum of consecutive naturals, for example, 1694 + ... + 11859.

It is an arithmetic number, because the mean of its divisors is an integer number (5123412).

Almost surely, 2^68889899 is an apocalyptic number.

68889899 is a deficient number, since it is larger than the sum of its proper divisors (13084693).

68889899 is a wasteful number, since it uses less digits than its factorization.

68889899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606.

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

The square root of 68889899 is about 8299.9939156604. The cubic root of 68889899 is about 409.9383190971.

The spelling of 68889899 in words is "sixty-eight million, eight hundred eighty-nine thousand, eight hundred ninety-nine".