170042447 has 4 divisors (see below), whose sum is σ = 170076456. Its totient is φ = 170008440.

The previous prime is 170042443. The next prime is 170042479. The reversal of 170042447 is 744240071.

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 170042447 - 2² = 170042443 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 (170042443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7868 + ... + 20049.

It is an arithmetic number, because the mean of its divisors is an integer number (42519114).

Almost surely, 2^170042447 is an apocalyptic number.

170042447 is a deficient number, since it is larger than the sum of its proper divisors (34009).

170042447 is an equidigital number, since it uses as much as digits as its factorization.

170042447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34008.

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 170042447 is about 13040.0324769534. The cubic root of 170042447 is about 554.0119280884.

The spelling of 170042447 in words is "one hundred seventy million, forty-two thousand, four hundred forty-seven".