68751999 has 6 divisors (see below), whose sum is σ = 99308456. Its totient is φ = 45834660.

The previous prime is 68751997. The next prime is 68752007. The reversal of 68751999 is 99915786.

It is not a de Polignac number, because 68751999 - 2¹ = 68751997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68751997) 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 5 ways as a sum of consecutive naturals, for example, 3819547 + ... + 3819564.

Almost surely, 2^68751999 is an apocalyptic number.

68751999 is a deficient number, since it is larger than the sum of its proper divisors (30556457).

68751999 is a wasteful number, since it uses less digits than its factorization.

68751999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639117 (or 7639114 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 68751999 is about 8291.6825192478. The cubic root of 68751999 is about 409.6646057424.

The spelling of 68751999 in words is "sixty-eight million, seven hundred fifty-one thousand, nine hundred ninety-nine".