705660091 has 4 divisors (see below), whose sum is σ = 705724272. Its totient is φ = 705595912.

The previous prime is 705660083. The next prime is 705660097. The reversal of 705660091 is 190066507.

705660091 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 705660091 - 2³ = 705660083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705660097) 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, 10960 + ... + 39133.

It is an arithmetic number, because the mean of its divisors is an integer number (176431068).

Almost surely, 2^705660091 is an apocalyptic number.

705660091 is a deficient number, since it is larger than the sum of its proper divisors (64181).

705660091 is a wasteful number, since it uses less digits than its factorization.

705660091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64180.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 705660091 is about 26564.2634191125. The cubic root of 705660091 is about 890.2907315129.

The spelling of 705660091 in words is "seven hundred five million, six hundred sixty thousand, ninety-one".