708994661 has 4 divisors (see below), whose sum is σ = 711414732. Its totient is φ = 706574592.

The previous prime is 708994651. The next prime is 708994667. The reversal of 708994661 is 166499807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166499807 = 2027 ⋅82141.

It can be written as a sum of positive squares in 2 ways, for example, as 504676225 + 204318436 = 22465^2 + 14294^2 .

It is a cyclic number.

It is not a de Polignac number, because 708994661 - 2²² = 704800357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (708994667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1209596 + ... + 1210181.

It is an arithmetic number, because the mean of its divisors is an integer number (177853683).

Almost surely, 2^708994661 is an apocalyptic number.

It is an amenable number.

708994661 is a deficient number, since it is larger than the sum of its proper divisors (2420071).

708994661 is a wasteful number, since it uses less digits than its factorization.

708994661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420070.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 708994661 is about 26626.9536560231. The cubic root of 708994661 is about 891.6908734143.

The spelling of 708994661 in words is "seven hundred eight million, nine hundred ninety-four thousand, six hundred sixty-one".