68947811 has 4 divisors (see below), whose sum is σ = 68966400. Its totient is φ = 68929224.

The previous prime is 68947807. The next prime is 68947829. The reversal of 68947811 is 11874986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11874986 = 2 ⋅5937493.

It is a cyclic number.

It is not a de Polignac number, because 68947811 - 2² = 68947807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68947831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616 + ... + 11853.

It is an arithmetic number, because the mean of its divisors is an integer number (17241600).

Almost surely, 2^68947811 is an apocalyptic number.

68947811 is a deficient number, since it is larger than the sum of its proper divisors (18589).

68947811 is a wasteful number, since it uses less digits than its factorization.

68947811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18588.

The product of its digits is 96768, while the sum is 44.

The square root of 68947811 is about 8303.4818600392. The cubic root of 68947811 is about 410.0531578905.

The spelling of 68947811 in words is "sixty-eight million, nine hundred forty-seven thousand, eight hundred eleven".