1094549681 has 2 divisors, whose sum is σ = 1094549682. Its totient is φ = 1094549680.

The previous prime is 1094549611. The next prime is 1094549683. The reversal of 1094549681 is 1869454901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730350625 + 364199056 = 27025^2 + 19084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1094549681 is a prime.

It is a super-2 number, since 2×1094549681² = 2396078008354403522, which contains 22 as substring.

Together with 1094549683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1094549683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547274840 + 547274841.

It is an arithmetic number, because the mean of its divisors is an integer number (547274841).

Almost surely, 2^1094549681 is an apocalyptic number.

It is an amenable number.

1094549681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1094549681 is an equidigital number, since it uses as much as digits as its factorization.

1094549681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1094549681 is about 33083.9792195558. The cubic root of 1094549681 is about 1030.5723657651.

The spelling of 1094549681 in words is "one billion, ninety-four million, five hundred forty-nine thousand, six hundred eighty-one".