170945947 has 4 divisors (see below), whose sum is σ = 171132880. Its totient is φ = 170759016.

The previous prime is 170945939. The next prime is 170945969. The reversal of 170945947 is 749549071.

170945947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749549071 = 37 ⋅20258083.

It is a cyclic number.

It is not a de Polignac number, because 170945947 - 2³ = 170945939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 170945897 and 170945906.

It is not an unprimeable number, because it can be changed into a prime (170945917) 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, 92088 + ... + 93925.

It is an arithmetic number, because the mean of its divisors is an integer number (42783220).

Almost surely, 2^170945947 is an apocalyptic number.

170945947 is a deficient number, since it is larger than the sum of its proper divisors (186933).

170945947 is an equidigital number, since it uses as much as digits as its factorization.

170945947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186932.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 170945947 is about 13074.6298991597. The cubic root of 170945947 is about 554.9914204772.

The spelling of 170945947 in words is "one hundred seventy million, nine hundred forty-five thousand, nine hundred forty-seven".