68136901 has 24 divisors (see below), whose sum is σ = 84620376. Its totient is φ = 54512640.

The previous prime is 68136877. The next prime is 68136911. The reversal of 68136901 is 10963186.

It can be written as a sum of positive squares in 4 ways, for example, as 6890625 + 61246276 = 2625^2 + 7826^2 .

It is not a de Polignac number, because 68136901 - 2⁷ = 68136773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68136911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130521 + ... + 131041.

It is an arithmetic number, because the mean of its divisors is an integer number (3525849).

Almost surely, 2^68136901 is an apocalyptic number.

It is an amenable number.

68136901 is a deficient number, since it is larger than the sum of its proper divisors (16483475).

68136901 is a wasteful number, since it uses less digits than its factorization.

68136901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 68136901 is about 8254.5079199187. The cubic root of 68136901 is about 408.4392396497.

The spelling of 68136901 in words is "sixty-eight million, one hundred thirty-six thousand, nine hundred one".