1071691189 has 4 divisors (see below), whose sum is σ = 1076290956. Its totient is φ = 1067091424.

The previous prime is 1071691177. The next prime is 1071691213. The reversal of 1071691189 is 9811961701.

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

It can be written as a sum of positive squares in 2 ways, for example, as 388287025 + 683404164 = 19705^2 + 26142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1071691189 - 2¹⁷ = 1071560117 is a prime.

It is a super-2 number, since 2×1071691189² = 2297044009160467442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071691139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299534 + ... + 2299999.

It is an arithmetic number, because the mean of its divisors is an integer number (269072739).

Almost surely, 2^1071691189 is an apocalyptic number.

It is an amenable number.

1071691189 is a deficient number, since it is larger than the sum of its proper divisors (4599767).

1071691189 is an equidigital number, since it uses as much as digits as its factorization.

1071691189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599766.

The product of its (nonzero) digits is 27216, while the sum is 43.

The square root of 1071691189 is about 32736.6948392778. The cubic root of 1071691189 is about 1023.3477052616.

The spelling of 1071691189 in words is "one billion, seventy-one million, six hundred ninety-one thousand, one hundred eighty-nine".