68434645 has 8 divisors (see below), whose sum is σ = 84341304. Its totient is φ = 53267904.

The previous prime is 68434643. The next prime is 68434649. The reversal of 68434645 is 54643486.

It can be written as a sum of positive squares in 4 ways, for example, as 16695396 + 51739249 = 4086^2 + 7193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68434645 - 2¹ = 68434643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68434598 and 68434607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68434643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184774 + ... + 185143.

It is an arithmetic number, because the mean of its divisors is an integer number (10542663).

Almost surely, 2^68434645 is an apocalyptic number.

It is an amenable number.

68434645 is a deficient number, since it is larger than the sum of its proper divisors (15906659).

68434645 is a wasteful number, since it uses less digits than its factorization.

68434645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369959.

The product of its digits is 276480, while the sum is 40.

The square root of 68434645 is about 8272.5234964913. The cubic root of 68434645 is about 409.0333065099.

The spelling of 68434645 in words is "sixty-eight million, four hundred thirty-four thousand, six hundred forty-five".