706391 has 4 divisors (see below), whose sum is σ = 807312. Its totient is φ = 605472.

The previous prime is 706373. The next prime is 706403. The reversal of 706391 is 193607.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-706391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 706391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706301) 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, 50450 + ... + 50463.

It is an arithmetic number, because the mean of its divisors is an integer number (201828).

2⁷⁰⁶³⁹¹ is an apocalyptic number.

706391 is a deficient number, since it is larger than the sum of its proper divisors (100921).

706391 is a wasteful number, since it uses less digits than its factorization.

706391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100920.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 706391 is about 840.4707014525. The cubic root of 706391 is about 89.0598007390.

Adding to 706391 its reverse (193607), we get a palindrome (899998).

The spelling of 706391 in words is "seven hundred six thousand, three hundred ninety-one".