1081589087 has 4 divisors (see below), whose sum is σ = 1081898760. Its totient is φ = 1081279416.

The previous prime is 1081589083. The next prime is 1081589123. The reversal of 1081589087 is 7809851801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7809851801 = 8011 ⋅974891.

It is a cyclic number.

It is not a de Polignac number, because 1081589087 - 2² = 1081589083 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 (1081589083) 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, 149537 + ... + 156602.

It is an arithmetic number, because the mean of its divisors is an integer number (270474690).

Almost surely, 2^1081589087 is an apocalyptic number.

1081589087 is a deficient number, since it is larger than the sum of its proper divisors (309673).

1081589087 is an equidigital number, since it uses as much as digits as its factorization.

1081589087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309672.

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 1081589087 is about 32887.5217521783. The cubic root of 1081589087 is about 1026.4885252118.

The spelling of 1081589087 in words is "one billion, eighty-one million, five hundred eighty-nine thousand, eighty-seven".