705997 has 4 divisors (see below), whose sum is σ = 725116. Its totient is φ = 686880.

The previous prime is 705989. The next prime is 706001. The reversal of 705997 is 799507.

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

It can be written as a sum of positive squares in 2 ways, for example, as 385641 + 320356 = 621^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 705997 - 2³ = 705989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 19081 = 705997 / (7 + 0 + 5 + 9 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705937) 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, 9504 + ... + 9577.

It is an arithmetic number, because the mean of its divisors is an integer number (181279).

2⁷⁰⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

705997 is a deficient number, since it is larger than the sum of its proper divisors (19119).

705997 is a wasteful number, since it uses less digits than its factorization.

705997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19118.

The product of its (nonzero) digits is 19845, while the sum is 37.

The square root of 705997 is about 840.2362762938. The cubic root of 705997 is about 89.0432395203.

The spelling of 705997 in words is "seven hundred five thousand, nine hundred ninety-seven".