745709 has 2 divisors, whose sum is σ = 745710. Its totient is φ = 745708.

The previous prime is 745699. The next prime is 745711. The reversal of 745709 is 907547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 31684 = 845^2 + 178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745709 is a prime.

It is a Sophie Germain prime.

Together with 745711, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745609) 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, 372854 + 372855.

It is an arithmetic number, because the mean of its divisors is an integer number (372855).

2⁷⁴⁵⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

745709 is a deficient number, since it is larger than the sum of its proper divisors (1).

745709 is an equidigital number, since it uses as much as digits as its factorization.

745709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 745709 is about 863.5444400840. The cubic root of 745709 is about 90.6824255936.

The spelling of 745709 in words is "seven hundred forty-five thousand, seven hundred nine".