209039616029 has 2 divisors, whose sum is σ = 209039616030. Its totient is φ = 209039616028.

The previous prime is 209039615977. The next prime is 209039616043. The reversal of 209039616029 is 920616930902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190161405625 + 18878210404 = 436075^2 + 137398^2 .

It is a cyclic number.

It is not a de Polignac number, because 209039616029 - 2⁸ = 209039615773 is a prime.

It is a super-2 number, since 2×209039616029² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209039616229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104519808014 + 104519808015.

It is an arithmetic number, because the mean of its divisors is an integer number (104519808015).

Almost surely, 2^209039616029 is an apocalyptic number.

It is an amenable number.

209039616029 is a deficient number, since it is larger than the sum of its proper divisors (1).

209039616029 is an equidigital number, since it uses as much as digits as its factorization.

209039616029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 209039616029 in words is "two hundred nine billion, thirty-nine million, six hundred sixteen thousand, twenty-nine".