68744945 has 16 divisors (see below), whose sum is σ = 87176640. Its totient is φ = 51897024.

The previous prime is 68744909. The next prime is 68744959. The reversal of 68744945 is 54944786.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68744945 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 68744945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25607 + ... + 28163.

It is an arithmetic number, because the mean of its divisors is an integer number (5448540).

Almost surely, 2^68744945 is an apocalyptic number.

It is an amenable number.

68744945 is a deficient number, since it is larger than the sum of its proper divisors (18431695).

68744945 is a wasteful number, since it uses less digits than its factorization.

68744945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864.

The product of its digits is 967680, while the sum is 47.

The square root of 68744945 is about 8291.2571423156. The cubic root of 68744945 is about 409.6505946445.

The spelling of 68744945 in words is "sixty-eight million, seven hundred forty-four thousand, nine hundred forty-five".