1131044023 has 4 divisors (see below), whose sum is σ = 1131201400. Its totient is φ = 1130886648.

The previous prime is 1131044011. The next prime is 1131044029. The reversal of 1131044023 is 3204401311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131044023 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 (1131044029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67365 + ... + 82462.

It is an arithmetic number, because the mean of its divisors is an integer number (282800350).

Almost surely, 2^1131044023 is an apocalyptic number.

1131044023 is a deficient number, since it is larger than the sum of its proper divisors (157377).

1131044023 is an equidigital number, since it uses as much as digits as its factorization.

1131044023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157376.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1131044023 is about 33630.9979483214. The cubic root of 1131044023 is about 1041.9011155385.

Adding to 1131044023 its reverse (3204401311), we get a palindrome (4335445334).

The spelling of 1131044023 in words is "one billion, one hundred thirty-one million, forty-four thousand, twenty-three".