1085527909 has 2 divisors, whose sum is σ = 1085527910. Its totient is φ = 1085527908.

The previous prime is 1085527829. The next prime is 1085527967. The reversal of 1085527909 is 9097255801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927019809 + 158508100 = 30447^2 + 12590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085527909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085527999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542763954 + 542763955.

It is an arithmetic number, because the mean of its divisors is an integer number (542763955).

Almost surely, 2^1085527909 is an apocalyptic number.

It is an amenable number.

1085527909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085527909 is an equidigital number, since it uses as much as digits as its factorization.

1085527909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 1085527909 is about 32947.3505611605. The cubic root of 1085527909 is about 1027.7330697912.

The spelling of 1085527909 in words is "one billion, eighty-five million, five hundred twenty-seven thousand, nine hundred nine".