706745561 has 2 divisors, whose sum is σ = 706745562. Its totient is φ = 706745560.

The previous prime is 706745537. The next prime is 706745563. The reversal of 706745561 is 165547607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705168025 + 1577536 = 26555^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 706745561 - 2⁶ = 706745497 is a prime.

It is a super-4 number, since 4×706745561⁴ (a number of 36 digits) contains 4444 as substring.

Together with 706745563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (706745563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353372780 + 353372781.

It is an arithmetic number, because the mean of its divisors is an integer number (353372781).

Almost surely, 2^706745561 is an apocalyptic number.

It is an amenable number.

706745561 is a deficient number, since it is larger than the sum of its proper divisors (1).

706745561 is an equidigital number, since it uses as much as digits as its factorization.

706745561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 706745561 is about 26584.6865883350. The cubic root of 706745561 is about 890.7469893287.

The spelling of 706745561 in words is "seven hundred six million, seven hundred forty-five thousand, five hundred sixty-one".