68893945 has 8 divisors (see below), whose sum is σ = 87535944. Its totient is φ = 51873024.

The previous prime is 68893939. The next prime is 68893973. The reversal of 68893945 is 54939886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8225424 + 60668521 = 2868^2 + 7789^2 .

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 68893945 - 2¹¹ = 68891897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68893892 and 68893901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405174 + ... + 405343.

It is an arithmetic number, because the mean of its divisors is an integer number (10941993).

Almost surely, 2^68893945 is an apocalyptic number.

It is an amenable number.

68893945 is a deficient number, since it is larger than the sum of its proper divisors (18641999).

68893945 is a wasteful number, since it uses less digits than its factorization.

68893945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810539.

The product of its digits is 1866240, while the sum is 52.

The square root of 68893945 is about 8300.2376472002. The cubic root of 68893945 is about 409.9463443567.

The spelling of 68893945 in words is "sixty-eight million, eight hundred ninety-three thousand, nine hundred forty-five".