696732209 has 2 divisors, whose sum is σ = 696732210. Its totient is φ = 696732208.

The previous prime is 696732193. The next prime is 696732217. The reversal of 696732209 is 902237696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580954609 + 115777600 = 24103^2 + 10760^2 .

It is a cyclic number.

It is not a de Polignac number, because 696732209 - 2⁴ = 696732193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 696732209.

It is not a weakly prime, because it can be changed into another prime (696732259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348366104 + 348366105.

It is an arithmetic number, because the mean of its divisors is an integer number (348366105).

Almost surely, 2^696732209 is an apocalyptic number.

It is an amenable number.

696732209 is a deficient number, since it is larger than the sum of its proper divisors (1).

696732209 is an equidigital number, since it uses as much as digits as its factorization.

696732209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 696732209 is about 26395.6854239476. The cubic root of 696732209 is about 886.5201867779.

The spelling of 696732209 in words is "six hundred ninety-six million, seven hundred thirty-two thousand, two hundred nine".