68170447 has 4 divisors (see below), whose sum is σ = 68832400. Its totient is φ = 67508496.

The previous prime is 68170433. The next prime is 68170451. The reversal of 68170447 is 74407186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68170447 - 2¹⁵ = 68137679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68180447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330822 + ... + 331027.

It is an arithmetic number, because the mean of its divisors is an integer number (17208100).

Almost surely, 2^68170447 is an apocalyptic number.

68170447 is a deficient number, since it is larger than the sum of its proper divisors (661953).

68170447 is a wasteful number, since it uses less digits than its factorization.

68170447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661952.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 68170447 is about 8256.5396504831. The cubic root of 68170447 is about 408.5062579349.

The spelling of 68170447 in words is "sixty-eight million, one hundred seventy thousand, four hundred forty-seven".