1085664539 has 2 divisors, whose sum is σ = 1085664540. Its totient is φ = 1085664538.

The previous prime is 1085664529. The next prime is 1085664581. The reversal of 1085664539 is 9354665801.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085664539 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1085664493 and 1085664502.

It is not a weakly prime, because it can be changed into another prime (1085664509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542832269 + 542832270.

It is an arithmetic number, because the mean of its divisors is an integer number (542832270).

Almost surely, 2^1085664539 is an apocalyptic number.

1085664539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085664539 is an equidigital number, since it uses as much as digits as its factorization.

1085664539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 1085664539 is about 32949.4239555110. The cubic root of 1085664539 is about 1027.7761865326.

The spelling of 1085664539 in words is "one billion, eighty-five million, six hundred sixty-four thousand, five hundred thirty-nine".