171400643 has 8 divisors (see below), whose sum is σ = 183031680. Its totient is φ = 160151040.

The previous prime is 171400639. The next prime is 171400651. The reversal of 171400643 is 346004171.

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

It is a cyclic number.

It is not a de Polignac number, because 171400643 - 2² = 171400639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171400693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94430 + ... + 96227.

It is an arithmetic number, because the mean of its divisors is an integer number (22878960).

Almost surely, 2^171400643 is an apocalyptic number.

171400643 is a deficient number, since it is larger than the sum of its proper divisors (11631037).

171400643 is a wasteful number, since it uses less digits than its factorization.

171400643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190717.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 171400643 is about 13092.0068362341. The cubic root of 171400643 is about 555.4830553495.

The spelling of 171400643 in words is "one hundred seventy-one million, four hundred thousand, six hundred forty-three".