68831911 has 4 divisors (see below), whose sum is σ = 69178000. Its totient is φ = 68485824.

The previous prime is 68831909. The next prime is 68831921. The reversal of 68831911 is 11913886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11913886 = 2 ⋅5956943.

It is a cyclic number.

It is not a de Polignac number, because 68831911 - 2¹ = 68831909 is a prime.

It is a super-3 number, since 3×68831911³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68831921) 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, 172746 + ... + 173143.

It is an arithmetic number, because the mean of its divisors is an integer number (17294500).

Almost surely, 2^68831911 is an apocalyptic number.

68831911 is a deficient number, since it is larger than the sum of its proper divisors (346089).

68831911 is a wasteful number, since it uses less digits than its factorization.

68831911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346088.

The product of its digits is 10368, while the sum is 37.

The square root of 68831911 is about 8296.4999246670. The cubic root of 68831911 is about 409.8232650926.

The spelling of 68831911 in words is "sixty-eight million, eight hundred thirty-one thousand, nine hundred eleven".