68813145 has 20 divisors (see below), whose sum is σ = 123354660. Its totient is φ = 36700128.

The previous prime is 68813137. The next prime is 68813177. The reversal of 68813145 is 54131886.

It can be written as a sum of positive squares in 2 ways, for example, as 13816089 + 54997056 = 3717^2 + 7416^2 .

It is not a de Polignac number, because 68813145 - 2³ = 68813137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84550 + ... + 85359.

It is an arithmetic number, because the mean of its divisors is an integer number (6167733).

Almost surely, 2^68813145 is an apocalyptic number.

It is an amenable number.

68813145 is a deficient number, since it is larger than the sum of its proper divisors (54541515).

68813145 is a wasteful number, since it uses less digits than its factorization.

68813145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169926 (or 169917 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 68813145 is about 8295.3688887234. The cubic root of 68813145 is about 409.7860176284.

The spelling of 68813145 in words is "sixty-eight million, eight hundred thirteen thousand, one hundred forty-five".