1085516489 has 2 divisors, whose sum is σ = 1085516490. Its totient is φ = 1085516488.

The previous prime is 1085516473. The next prime is 1085516507. The reversal of 1085516489 is 9846155801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713798089 + 371718400 = 26717^2 + 19280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085516489 - 2⁴ = 1085516473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1085516449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542758244 + 542758245.

It is an arithmetic number, because the mean of its divisors is an integer number (542758245).

Almost surely, 2^1085516489 is an apocalyptic number.

It is an amenable number.

1085516489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085516489 is an equidigital number, since it uses as much as digits as its factorization.

1085516489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 1085516489 is about 32947.1772539014. The cubic root of 1085516489 is about 1027.7294657835.

The spelling of 1085516489 in words is "one billion, eighty-five million, five hundred sixteen thousand, four hundred eighty-nine".