704686405 has 4 divisors (see below), whose sum is σ = 845623692. Its totient is φ = 563749120.

The previous prime is 704686403. The next prime is 704686427. The reversal of 704686405 is 504686407.

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 193293409 + 511392996 = 13903^2 + 22614^2 .

It is not a de Polignac number, because 704686405 - 2¹ = 704686403 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704686403) 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, 70468636 + ... + 70468645.

It is an arithmetic number, because the mean of its divisors is an integer number (211405923).

Almost surely, 2^704686405 is an apocalyptic number.

It is an amenable number.

704686405 is a deficient number, since it is larger than the sum of its proper divisors (140937287).

704686405 is a wasteful number, since it uses less digits than its factorization.

704686405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140937286.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 704686405 is about 26545.9301023716. The cubic root of 704686405 is about 889.8810618319.

The spelling of 704686405 in words is "seven hundred four million, six hundred eighty-six thousand, four hundred five".