68849861 has 4 divisors (see below), whose sum is σ = 68870400. Its totient is φ = 68829324.

The previous prime is 68849819. The next prime is 68849867. The reversal of 68849861 is 16894886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68849861 - 2⁶ = 68849797 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 (68849867) 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, 3941 + ... + 12378.

It is an arithmetic number, because the mean of its divisors is an integer number (17217600).

Almost surely, 2^68849861 is an apocalyptic number.

It is an amenable number.

68849861 is a deficient number, since it is larger than the sum of its proper divisors (20539).

68849861 is a wasteful number, since it uses less digits than its factorization.

68849861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20538.

The product of its digits is 663552, while the sum is 50.

The square root of 68849861 is about 8297.5816356334. The cubic root of 68849861 is about 409.8588865949.

The spelling of 68849861 in words is "sixty-eight million, eight hundred forty-nine thousand, eight hundred sixty-one".