209496697 has 2 divisors, whose sum is σ = 209496698. Its totient is φ = 209496696.

The previous prime is 209496671. The next prime is 209496713. The reversal of 209496697 is 796694902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165791376 + 43705321 = 12876^2 + 6611^2 .

It is a cyclic number.

It is not a de Polignac number, because 209496697 - 2¹⁵ = 209463929 is a prime.

It is not a weakly prime, because it can be changed into another prime (209497697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104748348 + 104748349.

It is an arithmetic number, because the mean of its divisors is an integer number (104748349).

Almost surely, 2^209496697 is an apocalyptic number.

It is an amenable number.

209496697 is a deficient number, since it is larger than the sum of its proper divisors (1).

209496697 is an equidigital number, since it uses as much as digits as its factorization.

209496697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 209496697 is about 14474.0007254387. Note that the first 3 decimals coincide. The cubic root of 209496697 is about 593.9169592599.

The spelling of 209496697 in words is "two hundred nine million, four hundred ninety-six thousand, six hundred ninety-seven".