68801905 has 8 divisors (see below), whose sum is σ = 82924200. Its totient is φ = 54800256.

The previous prime is 68801903. The next prime is 68801921. The reversal of 68801905 is 50910886.

It can be written as a sum of positive squares in 4 ways, for example, as 44997264 + 23804641 = 6708^2 + 4879^2 .

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 68801905 - 2¹ = 68801903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68801903) 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 7 ways as a sum of consecutive naturals, for example, 28900 + ... + 31189.

It is an arithmetic number, because the mean of its divisors is an integer number (10365525).

Almost surely, 2^68801905 is an apocalyptic number.

It is an amenable number.

68801905 is a deficient number, since it is larger than the sum of its proper divisors (14122295).

68801905 is a wasteful number, since it uses less digits than its factorization.

68801905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60323.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 68801905 is about 8294.6913746082. The cubic root of 68801905 is about 409.7637048099.

It can be divided in two parts, 6880190 and 5, that added together give a triangular number (6880195 = T₃₇₀₉).

The spelling of 68801905 in words is "sixty-eight million, eight hundred one thousand, nine hundred five".