704609781 has 8 divisors (see below), whose sum is σ = 971875680. Its totient is φ = 453541872.

The previous prime is 704609779. The next prime is 704609783. The reversal of 704609781 is 187906407.

It is an interprime number because it is at equal distance from previous prime (704609779) and next prime (704609783).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 704609781 - 2¹ = 704609779 is a prime.

It is a super-2 number, since 2×704609781² = 992949886961735922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704609783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4049395 + ... + 4049568.

It is an arithmetic number, because the mean of its divisors is an integer number (121484460).

Almost surely, 2^704609781 is an apocalyptic number.

It is an amenable number.

704609781 is a deficient number, since it is larger than the sum of its proper divisors (267265899).

704609781 is a wasteful number, since it uses less digits than its factorization.

704609781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098995.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 704609781 is about 26544.4868287183. The cubic root of 704609781 is about 889.8488069558.

The spelling of 704609781 in words is "seven hundred four million, six hundred nine thousand, seven hundred eighty-one".