1084999306789 has 2 divisors, whose sum is σ = 1084999306790. Its totient is φ = 1084999306788.

The previous prime is 1084999306757. The next prime is 1084999306841. The reversal of 1084999306789 is 9876039994801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1084999306689 + 100 = 1041633^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084999306789 - 2⁵ = 1084999306757 is a prime.

It is a super-2 number, since 2×1084999306789² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084999376789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542499653394 + 542499653395.

It is an arithmetic number, because the mean of its divisors is an integer number (542499653395).

Almost surely, 2^{1084999306789} is an apocalyptic number.

It is an amenable number.

1084999306789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084999306789 is an equidigital number, since it uses as much as digits as its factorization.

1084999306789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211631616, while the sum is 73.

The spelling of 1084999306789 in words is "one trillion, eighty-four billion, nine hundred ninety-nine million, three hundred six thousand, seven hundred eighty-nine".