1085492389 has 2 divisors, whose sum is σ = 1085492390. Its totient is φ = 1085492388.

The previous prime is 1085492357. The next prime is 1085492399. The reversal of 1085492389 is 9832945801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575184289 + 510308100 = 23983^2 + 22590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085492389 - 2⁵ = 1085492357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085492399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542746194 + 542746195.

It is an arithmetic number, because the mean of its divisors is an integer number (542746195).

Almost surely, 2^1085492389 is an apocalyptic number.

It is an amenable number.

1085492389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085492389 is an equidigital number, since it uses as much as digits as its factorization.

1085492389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 1085492389 is about 32946.8115149251. The cubic root of 1085492389 is about 1027.7218600451.

The spelling of 1085492389 in words is "one billion, eighty-five million, four hundred ninety-two thousand, three hundred eighty-nine".