68236861 has 36 divisors (see below), whose sum is σ = 92518524. Its totient is φ = 49969920.

The previous prime is 68236813. The next prime is 68236867. The reversal of 68236861 is 16863286.

It can be written as a sum of positive squares in 2 ways, for example, as 62900761 + 5336100 = 7931^2 + 2310^2 .

It is not a de Polignac number, because 68236861 - 2⁹ = 68236349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68236867) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 100455 + ... + 101131.

It is an arithmetic number, because the mean of its divisors is an integer number (2569959).

Almost surely, 2^68236861 is an apocalyptic number.

It is an amenable number.

68236861 is a deficient number, since it is larger than the sum of its proper divisors (24281663).

68236861 is a wasteful number, since it uses less digits than its factorization.

68236861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 712 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 68236861 is about 8260.5605741983. The cubic root of 68236861 is about 408.6388751714.

The spelling of 68236861 in words is "sixty-eight million, two hundred thirty-six thousand, eight hundred sixty-one".