705640703129 has 4 divisors (see below), whose sum is σ = 705676963200. Its totient is φ = 705604443060.

The previous prime is 705640703123. The next prime is 705640703147. The reversal of 705640703129 is 921307046507.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 705640703129 - 2⁸ = 705640702873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 705640703129.

It is not an unprimeable number, because it can be changed into a prime (705640703123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18100829 + ... + 18139770.

It is an arithmetic number, because the mean of its divisors is an integer number (176419240800).

Almost surely, 2^705640703129 is an apocalyptic number.

It is an amenable number.

705640703129 is a deficient number, since it is larger than the sum of its proper divisors (36260071).

705640703129 is a wasteful number, since it uses less digits than its factorization.

705640703129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36260070.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 705640703129 in words is "seven hundred five billion, six hundred forty million, seven hundred three thousand, one hundred twenty-nine".