1147320311 has 4 divisors (see below), whose sum is σ = 1163479824. Its totient is φ = 1131160800.

The previous prime is 1147320299. The next prime is 1147320329. The reversal of 1147320311 is 1130237411.

It is a happy number.

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 1147320311 - 2¹⁰ = 1147319287 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 (1147320511) 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, 8079650 + ... + 8079791.

It is an arithmetic number, because the mean of its divisors is an integer number (290869956).

Almost surely, 2^1147320311 is an apocalyptic number.

1147320311 is a deficient number, since it is larger than the sum of its proper divisors (16159513).

1147320311 is an equidigital number, since it uses as much as digits as its factorization.

1147320311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16159512.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1147320311 is about 33872.1170138508. The cubic root of 1147320311 is about 1046.8751573369.

Adding to 1147320311 its reverse (1130237411), we get a palindrome (2277557722).

The spelling of 1147320311 in words is "one billion, one hundred forty-seven million, three hundred twenty thousand, three hundred eleven".