68911005 has 16 divisors (see below), whose sum is σ = 116061120. Its totient is φ = 34818048.

The previous prime is 68911001. The next prime is 68911033. The reversal of 68911005 is 50011986.

It is a happy number.

It is not a de Polignac number, because 68911005 - 2² = 68911001 is a prime.

It is a super-2 number, since 2×68911005² = 9497453220220050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68911001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120612 + ... + 121181.

It is an arithmetic number, because the mean of its divisors is an integer number (7253820).

Almost surely, 2^68911005 is an apocalyptic number.

It is an amenable number.

68911005 is a deficient number, since it is larger than the sum of its proper divisors (47150115).

68911005 is a wasteful number, since it uses less digits than its factorization.

68911005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241820.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 68911005 is about 8301.2652650063. The cubic root of 68911005 is about 409.9801794900.

The spelling of 68911005 in words is "sixty-eight million, nine hundred eleven thousand, five".