1131344013 has 4 divisors (see below), whose sum is σ = 1508458688. Its totient is φ = 754229340.

The previous prime is 1131344009. The next prime is 1131344017. The reversal of 1131344013 is 3104431311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1131344009) and next prime (1131344017).

It is not a de Polignac number, because 1131344013 - 2² = 1131344009 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 (1131344017) 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, 188557333 + ... + 188557338.

It is an arithmetic number, because the mean of its divisors is an integer number (377114672).

Almost surely, 2^1131344013 is an apocalyptic number.

It is an amenable number.

1131344013 is a deficient number, since it is larger than the sum of its proper divisors (377114675).

1131344013 is an equidigital number, since it uses as much as digits as its factorization.

1131344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377114674.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1131344013 is about 33635.4576749002. The cubic root of 1131344013 is about 1041.9932228540.

Adding to 1131344013 its reverse (3104431311), we get a palindrome (4235775324).

The spelling of 1131344013 in words is "one billion, one hundred thirty-one million, three hundred forty-four thousand, thirteen".