1084778771429 has 2 divisors, whose sum is σ = 1084778771430. Its totient is φ = 1084778771428.

The previous prime is 1084778771359. The next prime is 1084778771501. The reversal of 1084778771429 is 9241778774801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1021973399329 + 62805372100 = 1010927^2 + 250610^2 .

It is an emirp because it is prime and its reverse (9241778774801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1084778771429 - 2¹⁶ = 1084778705893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084778771929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542389385714 + 542389385715.

It is an arithmetic number, because the mean of its divisors is an integer number (542389385715).

Almost surely, 2^{1084778771429} is an apocalyptic number.

It is an amenable number.

1084778771429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084778771429 is an equidigital number, since it uses as much as digits as its factorization.

1084778771429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44255232, while the sum is 65.

The spelling of 1084778771429 in words is "one trillion, eighty-four billion, seven hundred seventy-eight million, seven hundred seventy-one thousand, four hundred twenty-nine".