68836945 has 4 divisors (see below), whose sum is σ = 82604340. Its totient is φ = 55069552.

The previous prime is 68836931. The next prime is 68836951. The reversal of 68836945 is 54963886.

It is a happy number.

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 43996689 + 24840256 = 6633^2 + 4984^2 .

It is a cyclic number.

It is not a de Polignac number, because 68836945 - 2⁵ = 68836913 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6883690 + ... + 6883699.

It is an arithmetic number, because the mean of its divisors is an integer number (20651085).

Almost surely, 2^68836945 is an apocalyptic number.

It is an amenable number.

68836945 is a deficient number, since it is larger than the sum of its proper divisors (13767395).

68836945 is a wasteful number, since it uses less digits than its factorization.

68836945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13767394.

The product of its digits is 1244160, while the sum is 49.

The square root of 68836945 is about 8296.8033000668. The cubic root of 68836945 is about 409.8332556139.

The spelling of 68836945 in words is "sixty-eight million, eight hundred thirty-six thousand, nine hundred forty-five".