704859709 has 4 divisors (see below), whose sum is σ = 711838620. Its totient is φ = 697880800.

The previous prime is 704859677. The next prime is 704859733. The reversal of 704859709 is 907958407.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907958407 = 41 ⋅22145327.

It can be written as a sum of positive squares in 2 ways, for example, as 400880484 + 303979225 = 20022^2 + 17435^2 .

It is a cyclic number.

It is not a de Polignac number, because 704859709 - 2⁵ = 704859677 is a prime.

It is a Smith number, since the sum of its digits (49) 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 (704859769) 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, 3489304 + ... + 3489505.

It is an arithmetic number, because the mean of its divisors is an integer number (177959655).

Almost surely, 2^704859709 is an apocalyptic number.

It is an amenable number.

704859709 is a deficient number, since it is larger than the sum of its proper divisors (6978911).

704859709 is a wasteful number, since it uses less digits than its factorization.

704859709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978910.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 704859709 is about 26549.1941308960. The cubic root of 704859709 is about 889.9540055345.

The spelling of 704859709 in words is "seven hundred four million, eight hundred fifty-nine thousand, seven hundred nine".