201020989439 has 2 divisors, whose sum is σ = 201020989440. Its totient is φ = 201020989438.

The previous prime is 201020989423. The next prime is 201020989471. The reversal of 201020989439 is 934989020102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020989439 - 2⁴ = 201020989423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201020989393 and 201020989402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020988439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510494719 + 100510494720.

It is an arithmetic number, because the mean of its divisors is an integer number (100510494720).

Almost surely, 2^201020989439 is an apocalyptic number.

201020989439 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020989439 is an equidigital number, since it uses as much as digits as its factorization.

201020989439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 201020989439 in words is "two hundred one billion, twenty million, nine hundred eighty-nine thousand, four hundred thirty-nine".