706631 has 2 divisors, whose sum is σ = 706632. Its totient is φ = 706630.

The previous prime is 706621. The next prime is 706633. The reversal of 706631 is 136607.

It is a strong prime.

It is an emirp because it is prime and its reverse (136607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 706631 - 2¹⁸ = 444487 is a prime.

It is a super-2 number, since 2×706631² = 998654740322, which contains 22 as substring.

Together with 706633, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₅₇₀₄₇ and since 706631 and 57047 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 706597 and 706606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353315 + 353316.

It is an arithmetic number, because the mean of its divisors is an integer number (353316).

2⁷⁰⁶⁶³¹ is an apocalyptic number.

706631 is a deficient number, since it is larger than the sum of its proper divisors (1).

706631 is an equidigital number, since it uses as much as digits as its factorization.

706631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 706631 is about 840.6134664636. The cubic root of 706631 is about 89.0698857731.

The spelling of 706631 in words is "seven hundred six thousand, six hundred thirty-one".