1110605989 has 2 divisors, whose sum is σ = 1110605990. Its totient is φ = 1110605988.

The previous prime is 1110605987. The next prime is 1110606001. The reversal of 1110605989 is 9895060111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058981764 + 51624225 = 32542^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110605989 - 2¹ = 1110605987 is a prime.

Together with 1110605987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110605987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555302994 + 555302995.

It is an arithmetic number, because the mean of its divisors is an integer number (555302995).

Almost surely, 2^1110605989 is an apocalyptic number.

It is an amenable number.

1110605989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110605989 is an equidigital number, since it uses as much as digits as its factorization.

1110605989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 1110605989 is about 33325.7556403452. The cubic root of 1110605989 is about 1035.5871916768.

The spelling of 1110605989 in words is "one billion, one hundred ten million, six hundred five thousand, nine hundred eighty-nine".