1009378781239 has 2 divisors, whose sum is σ = 1009378781240. Its totient is φ = 1009378781238.

The previous prime is 1009378781231. The next prime is 1009378781291. The reversal of 1009378781239 is 9321878739001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1009378781239 - 2³ = 1009378781231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009378781231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504689390619 + 504689390620.

It is an arithmetic number, because the mean of its divisors is an integer number (504689390620).

Almost surely, 2^{1009378781239} is an apocalyptic number.

1009378781239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009378781239 is an equidigital number, since it uses as much as digits as its factorization.

1009378781239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 1009378781239 in words is "one trillion, nine billion, three hundred seventy-eight million, seven hundred eighty-one thousand, two hundred thirty-nine".