1131343247 has 8 divisors (see below), whose sum is σ = 1154550240. Its totient is φ = 1108205280.

The previous prime is 1131343219. The next prime is 1131343261. The reversal of 1131343247 is 7423431311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131343247 - 2¹² = 1131339151 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 (1131348247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16529 + ... + 50357.

It is an arithmetic number, because the mean of its divisors is an integer number (144318780).

Almost surely, 2^1131343247 is an apocalyptic number.

1131343247 is a deficient number, since it is larger than the sum of its proper divisors (23206993).

1131343247 is an equidigital number, since it uses as much as digits as its factorization.

1131343247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34513.

The product of its digits is 6048, while the sum is 29.

The square root of 1131343247 is about 33635.4462881051. The cubic root of 1131343247 is about 1041.9929876862.

Adding to 1131343247 its reverse (7423431311), we get a palindrome (8554774558).

The spelling of 1131343247 in words is "one billion, one hundred thirty-one million, three hundred forty-three thousand, two hundred forty-seven".