1081312791 has 16 divisors (see below), whose sum is σ = 1553924064. Its totient is φ = 664879104.

The previous prime is 1081312783. The next prime is 1081312807. The reversal of 1081312791 is 1972131801.

It is not a de Polignac number, because 1081312791 - 2³ = 1081312783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081312741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39895 + ... + 61271.

It is an arithmetic number, because the mean of its divisors is an integer number (97120254).

Almost surely, 2^1081312791 is an apocalyptic number.

1081312791 is a deficient number, since it is larger than the sum of its proper divisors (472611273).

1081312791 is a wasteful number, since it uses less digits than its factorization.

1081312791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22690.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 1081312791 is about 32883.3208633191. The cubic root of 1081312791 is about 1026.4011109832.

The spelling of 1081312791 in words is "one billion, eighty-one million, three hundred twelve thousand, seven hundred ninety-one".