68901845 has 4 divisors (see below), whose sum is σ = 82682220. Its totient is φ = 55121472.

The previous prime is 68901841. The next prime is 68901851. The reversal of 68901845 is 54810986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18335524 + 50566321 = 4282^2 + 7111^2 .

It is a cyclic number.

It is not a de Polignac number, because 68901845 - 2² = 68901841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68901841) 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, 6890180 + ... + 6890189.

It is an arithmetic number, because the mean of its divisors is an integer number (20670555).

Almost surely, 2^68901845 is an apocalyptic number.

It is an amenable number.

68901845 is a deficient number, since it is larger than the sum of its proper divisors (13780375).

68901845 is a wasteful number, since it uses less digits than its factorization.

68901845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13780374.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 68901845 is about 8300.7135235472. The cubic root of 68901845 is about 409.9620131373.

The spelling of 68901845 in words is "sixty-eight million, nine hundred one thousand, eight hundred forty-five".