706399 has 4 divisors (see below), whose sum is σ = 737136. Its totient is φ = 675664.

The previous prime is 706373. The next prime is 706403. The reversal of 706399 is 993607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993607 = 199 ⋅4993.

It is a cyclic number.

It is not a de Polignac number, because 706399 - 2¹⁹ = 182111 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 (706309) 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, 15334 + ... + 15379.

It is an arithmetic number, because the mean of its divisors is an integer number (184284).

2⁷⁰⁶³⁹⁹ is an apocalyptic number.

706399 is a deficient number, since it is larger than the sum of its proper divisors (30737).

706399 is a wasteful number, since it uses less digits than its factorization.

706399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30736.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 706399 is about 840.4754606769. The cubic root of 706399 is about 89.0601369436.

The spelling of 706399 in words is "seven hundred six thousand, three hundred ninety-nine".