709847987129 has 2 divisors, whose sum is σ = 709847987130. Its totient is φ = 709847987128.

The previous prime is 709847987119. The next prime is 709847987137. The reversal of 709847987129 is 921789748907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388951795600 + 320896191529 = 623660^2 + 566477^2 .

It is an emirp because it is prime and its reverse (921789748907) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-709847987129 is a prime.

It is not a weakly prime, because it can be changed into another prime (709847987119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354923993564 + 354923993565.

It is an arithmetic number, because the mean of its divisors is an integer number (354923993565).

Almost surely, 2^709847987129 is an apocalyptic number.

It is an amenable number.

709847987129 is a deficient number, since it is larger than the sum of its proper divisors (1).

709847987129 is an equidigital number, since it uses as much as digits as its factorization.

709847987129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128024064, while the sum is 71.

The spelling of 709847987129 in words is "seven hundred nine billion, eight hundred forty-seven million, nine hundred eighty-seven thousand, one hundred twenty-nine".