1095398581 has 2 divisors, whose sum is σ = 1095398582. Its totient is φ = 1095398580.

The previous prime is 1095398567. The next prime is 1095398597. The reversal of 1095398581 is 1858935901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965096356 + 130302225 = 31066^2 + 11415^2 .

It is an emirp because it is prime and its reverse (1858935901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1095398581 - 2⁷ = 1095398453 is a prime.

It is a super-2 number, since 2×1095398581² = 2399796102513627122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1095399581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547699290 + 547699291.

It is an arithmetic number, because the mean of its divisors is an integer number (547699291).

Almost surely, 2^1095398581 is an apocalyptic number.

It is an amenable number.

1095398581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1095398581 is an equidigital number, since it uses as much as digits as its factorization.

1095398581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 49.

The square root of 1095398581 is about 33096.8062054332. The cubic root of 1095398581 is about 1030.8387239530.

The spelling of 1095398581 in words is "one billion, ninety-five million, three hundred ninety-eight thousand, five hundred eighty-one".