1086189661 has 4 divisors (see below), whose sum is σ = 1086314400. Its totient is φ = 1086064924.

The previous prime is 1086189647. The next prime is 1086189673. The reversal of 1086189661 is 1669816801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1669816801 = 167 ⋅9998903.

It is a cyclic number.

It is not a de Polignac number, because 1086189661 - 2¹³ = 1086181469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086139661) 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, 48241 + ... + 67078.

It is an arithmetic number, because the mean of its divisors is an integer number (271578600).

Almost surely, 2^1086189661 is an apocalyptic number.

It is an amenable number.

1086189661 is a deficient number, since it is larger than the sum of its proper divisors (124739).

1086189661 is an equidigital number, since it uses as much as digits as its factorization.

1086189661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124738.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 1086189661 is about 32957.3915988508. The cubic root of 1086189661 is about 1027.9418672053.

The spelling of 1086189661 in words is "one billion, eighty-six million, one hundred eighty-nine thousand, six hundred sixty-one".