1085631539 has 4 divisors (see below), whose sum is σ = 1085895624. Its totient is φ = 1085367456.

The previous prime is 1085631529. The next prime is 1085631551. The reversal of 1085631539 is 9351365801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085631539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1085631496 and 1085631505.

It is not an unprimeable number, because it can be changed into a prime (1085631529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125777 + ... + 134130.

It is an arithmetic number, because the mean of its divisors is an integer number (271473906).

Almost surely, 2^1085631539 is an apocalyptic number.

1085631539 is a deficient number, since it is larger than the sum of its proper divisors (264085).

1085631539 is an equidigital number, since it uses as much as digits as its factorization.

1085631539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264084.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 1085631539 is about 32948.9231842256. The cubic root of 1085631539 is about 1027.7657729544.

The spelling of 1085631539 in words is "one billion, eighty-five million, six hundred thirty-one thousand, five hundred thirty-nine".