705671 has 4 divisors (see below), whose sum is σ = 707472. Its totient is φ = 703872.

The previous prime is 705643. The next prime is 705689. The reversal of 705671 is 176507.

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 705671 - 2¹⁰ = 704647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705631) 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, 35 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (176868).

2⁷⁰⁵⁶⁷¹ is an apocalyptic number.

705671 is a deficient number, since it is larger than the sum of its proper divisors (1801).

705671 is a wasteful number, since it uses less digits than its factorization.

705671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 705671 is about 840.0422608417. The cubic root of 705671 is about 89.0295319242.

The spelling of 705671 in words is "seven hundred five thousand, six hundred seventy-one".