209030521703 has 2 divisors, whose sum is σ = 209030521704. Its totient is φ = 209030521702.

The previous prime is 209030521699. The next prime is 209030521751. The reversal of 209030521703 is 307125030902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209030521703 - 2² = 209030521699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209030521703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209030521753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104515260851 + 104515260852.

It is an arithmetic number, because the mean of its divisors is an integer number (104515260852).

Almost surely, 2^209030521703 is an apocalyptic number.

209030521703 is a deficient number, since it is larger than the sum of its proper divisors (1).

209030521703 is an equidigital number, since it uses as much as digits as its factorization.

209030521703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 209030521703 in words is "two hundred nine billion, thirty million, five hundred twenty-one thousand, seven hundred three".