1085661547 has 2 divisors, whose sum is σ = 1085661548. Its totient is φ = 1085661546.

The previous prime is 1085661527. The next prime is 1085661553. The reversal of 1085661547 is 7451665801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1085661547 - 2²³ = 1077272939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1085661527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542830773 + 542830774.

It is an arithmetic number, because the mean of its divisors is an integer number (542830774).

Almost surely, 2^1085661547 is an apocalyptic number.

1085661547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085661547 is an equidigital number, since it uses as much as digits as its factorization.

1085661547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1085661547 is about 32949.3785525615. The cubic root of 1085661547 is about 1027.7752423769.

The spelling of 1085661547 in words is "one billion, eighty-five million, six hundred sixty-one thousand, five hundred forty-seven".