1031113091 has 4 divisors (see below), whose sum is σ = 1031617392. Its totient is φ = 1030608792.

The previous prime is 1031113081. The next prime is 1031113133. The reversal of 1031113091 is 1903111301.

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

It is a cyclic number.

It is not a de Polignac number, because 1031113091 - 2²² = 1026918787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031113021) 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, 249071 + ... + 253176.

It is an arithmetic number, because the mean of its divisors is an integer number (257904348).

Almost surely, 2^1031113091 is an apocalyptic number.

1031113091 is a deficient number, since it is larger than the sum of its proper divisors (504301).

1031113091 is an equidigital number, since it uses as much as digits as its factorization.

1031113091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504300.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1031113091 is about 32110.9497056689. The cubic root of 1031113091 is about 1010.2652935098.

Adding to 1031113091 its reverse (1903111301), we get a palindrome (2934224392).

The spelling of 1031113091 in words is "one billion, thirty-one million, one hundred thirteen thousand, ninety-one".