68241905 has 8 divisors (see below), whose sum is σ = 82315752. Its totient is φ = 54309888.

The previous prime is 68241889. The next prime is 68241913. The reversal of 68241905 is 50914286.

It can be written as a sum of positive squares in 4 ways, for example, as 2421136 + 65820769 = 1556^2 + 8113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68241905 - 2⁴ = 68241889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34394 + ... + 36323.

It is an arithmetic number, because the mean of its divisors is an integer number (10289469).

Almost surely, 2^68241905 is an apocalyptic number.

It is an amenable number.

68241905 is a deficient number, since it is larger than the sum of its proper divisors (14073847).

68241905 is a wasteful number, since it uses less digits than its factorization.

68241905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70915.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 68241905 is about 8260.8658747131. The cubic root of 68241905 is about 408.6489436479.

The spelling of 68241905 in words is "sixty-eight million, two hundred forty-one thousand, nine hundred five".