68995811 has 4 divisors (see below), whose sum is σ = 69136824. Its totient is φ = 68854800.

The previous prime is 68995807. The next prime is 68995831. The reversal of 68995811 is 11859986.

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 68995811 - 2² = 68995807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68995831) 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 3 ways as a sum of consecutive naturals, for example, 69770 + ... + 70751.

It is an arithmetic number, because the mean of its divisors is an integer number (17284206).

Almost surely, 2^68995811 is an apocalyptic number.

68995811 is a deficient number, since it is larger than the sum of its proper divisors (141013).

68995811 is a wasteful number, since it uses less digits than its factorization.

68995811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141012.

The product of its digits is 155520, while the sum is 47.

The square root of 68995811 is about 8306.3717109217. The cubic root of 68995811 is about 410.1482925802.

The spelling of 68995811 in words is "sixty-eight million, nine hundred ninety-five thousand, eight hundred eleven".