68408109 has 24 divisors (see below), whose sum is σ = 123195072. Its totient is φ = 35536320.

The previous prime is 68408089. The next prime is 68408117. The reversal of 68408109 is 90180486.

It is a happy number.

It is not a de Polignac number, because 68408109 - 2¹⁵ = 68375341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68403109) 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 23 ways as a sum of consecutive naturals, for example, 48664 + ... + 50049.

It is an arithmetic number, because the mean of its divisors is an integer number (5133128).

Almost surely, 2^68408109 is an apocalyptic number.

It is an amenable number.

68408109 is a deficient number, since it is larger than the sum of its proper divisors (54786963).

68408109 is a wasteful number, since it uses less digits than its factorization.

68408109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98737 (or 98734 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68408109 is about 8270.9194773012. The cubic root of 68408109 is about 408.9804311909.

The spelling of 68408109 in words is "sixty-eight million, four hundred eight thousand, one hundred nine".