1085658971 has 4 divisors (see below), whose sum is σ = 1085756832. Its totient is φ = 1085561112.

The previous prime is 1085658953. The next prime is 1085658997. The reversal of 1085658971 is 1798565801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1798565801 = 1877 ⋅958213.

It is a cyclic number.

It is not a de Polignac number, because 1085658971 - 2¹⁴ = 1085642587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085658671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29795 + ... + 55308.

It is an arithmetic number, because the mean of its divisors is an integer number (271439208).

Almost surely, 2^1085658971 is an apocalyptic number.

1085658971 is a deficient number, since it is larger than the sum of its proper divisors (97861).

1085658971 is an equidigital number, since it uses as much as digits as its factorization.

1085658971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97860.

The product of its (nonzero) digits is 604800, while the sum is 50.

The square root of 1085658971 is about 32949.3394622715. The cubic root of 1085658971 is about 1027.7744294928.

The spelling of 1085658971 in words is "one billion, eighty-five million, six hundred fifty-eight thousand, nine hundred seventy-one".