68508911 has 4 divisors (see below), whose sum is σ = 68919312. Its totient is φ = 68098512.

The previous prime is 68508901. The next prime is 68508931. The reversal of 68508911 is 11980586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11980586 = 2 ⋅5990293.

It is a cyclic number.

It is not a de Polignac number, because 68508911 - 2¹⁴ = 68492527 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 (68508901) 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, 204950 + ... + 205283.

It is an arithmetic number, because the mean of its divisors is an integer number (17229828).

Almost surely, 2^68508911 is an apocalyptic number.

68508911 is a deficient number, since it is larger than the sum of its proper divisors (410401).

68508911 is a wasteful number, since it uses less digits than its factorization.

68508911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410400.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 68508911 is about 8277.0109943143. The cubic root of 68508911 is about 409.1812154410.

The spelling of 68508911 in words is "sixty-eight million, five hundred eight thousand, nine hundred eleven".