1093814772781 has 2 divisors, whose sum is σ = 1093814772782. Its totient is φ = 1093814772780.

The previous prime is 1093814772709. The next prime is 1093814772797. The reversal of 1093814772781 is 1872774183901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1064681403556 + 29133369225 = 1031834^2 + 170685^2 .

It is an emirp because it is prime and its reverse (1872774183901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1093814772781 - 2¹⁹ = 1093814248493 is a prime.

It is a super-2 number, since 2×1093814772781² (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 (1093814872781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546907386390 + 546907386391.

It is an arithmetic number, because the mean of its divisors is an integer number (546907386391).

Almost surely, 2^{1093814772781} is an apocalyptic number.

It is an amenable number.

1093814772781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1093814772781 is an equidigital number, since it uses as much as digits as its factorization.

1093814772781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 58.

The spelling of 1093814772781 in words is "one trillion, ninety-three billion, eight hundred fourteen million, seven hundred seventy-two thousand, seven hundred eighty-one".