1081598091 has 16 divisors (see below), whose sum is σ = 1701316608. Its totient is φ = 598118400.

The previous prime is 1081598071. The next prime is 1081598093. The reversal of 1081598091 is 1908951801.

It is not a de Polignac number, because 1081598091 - 2¹⁰ = 1081597067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1081598093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830070 + ... + 831371.

It is an arithmetic number, because the mean of its divisors is an integer number (106332288).

Almost surely, 2^1081598091 is an apocalyptic number.

1081598091 is a deficient number, since it is larger than the sum of its proper divisors (619718517).

1081598091 is a wasteful number, since it uses less digits than its factorization.

1081598091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661482.

The product of its (nonzero) digits is 25920, while the sum is 42.

The square root of 1081598091 is about 32887.6586427189. The cubic root of 1081598091 is about 1026.4913736370.

The spelling of 1081598091 in words is "one billion, eighty-one million, five hundred ninety-eight thousand, ninety-one".