1110990581 has 2 divisors, whose sum is σ = 1110990582. Its totient is φ = 1110990580.

The previous prime is 1110990563. The next prime is 1110990589. The reversal of 1110990581 is 1850990111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 892216900 + 218773681 = 29870^2 + 14791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110990581 - 2²² = 1106796277 is a prime.

It is a super-2 number, since 2×1110990581² = 2468600142141435122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110990589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555495290 + 555495291.

It is an arithmetic number, because the mean of its divisors is an integer number (555495291).

Almost surely, 2^1110990581 is an apocalyptic number.

It is an amenable number.

1110990581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110990581 is an equidigital number, since it uses as much as digits as its factorization.

1110990581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 35.

The square root of 1110990581 is about 33331.5253326337. The cubic root of 1110990581 is about 1035.7067157891.

The spelling of 1110990581 in words is "one billion, one hundred ten million, nine hundred ninety thousand, five hundred eighty-one".