696969709 has 2 divisors, whose sum is σ = 696969710. Its totient is φ = 696969708.

The previous prime is 696969697. The next prime is 696969727. The reversal of 696969709 is 907969696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696801609 + 168100 = 26397^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 696969709 - 2¹⁵ = 696936941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696969739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348484854 + 348484855.

It is an arithmetic number, because the mean of its divisors is an integer number (348484855).

Almost surely, 2^696969709 is an apocalyptic number.

It is an amenable number.

696969709 is a deficient number, since it is larger than the sum of its proper divisors (1).

696969709 is an equidigital number, since it uses as much as digits as its factorization.

696969709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The square root of 696969709 is about 26400.1838819354. The cubic root of 696969709 is about 886.6209067879.

The spelling of 696969709 in words is "six hundred ninety-six million, nine hundred sixty-nine thousand, seven hundred nine".