68170145 has 8 divisors (see below), whose sum is σ = 82648104. Its totient is φ = 53973504.

The previous prime is 68170133. The next prime is 68170159. The reversal of 68170145 is 54107186.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18284176 + 49885969 = 4276^2 + 7063^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68170145 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 69794 + ... + 70763.

It is an arithmetic number, because the mean of its divisors is an integer number (10331013).

Almost surely, 2^68170145 is an apocalyptic number.

It is an amenable number.

68170145 is a deficient number, since it is larger than the sum of its proper divisors (14477959).

68170145 is a wasteful number, since it uses less digits than its factorization.

68170145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140659.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 68170145 is about 8256.5213619296. The cubic root of 68170145 is about 408.5056546966.

The spelling of 68170145 in words is "sixty-eight million, one hundred seventy thousand, one hundred forty-five".