1161323147 has 16 divisors (see below), whose sum is σ = 1219891200. Its totient is φ = 1104217920.

The previous prime is 1161323129. The next prime is 1161323161. The reversal of 1161323147 is 7413231611.

It is a cyclic number.

It is not a de Polignac number, because 1161323147 - 2¹² = 1161319051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161323447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554879 + ... + 556967.

It is an arithmetic number, because the mean of its divisors is an integer number (76243200).

Almost surely, 2^1161323147 is an apocalyptic number.

1161323147 is a deficient number, since it is larger than the sum of its proper divisors (58568053).

1161323147 is a wasteful number, since it uses less digits than its factorization.

1161323147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426.

The product of its digits is 3024, while the sum is 29.

The square root of 1161323147 is about 34078.1916627042. The cubic root of 1161323147 is about 1051.1169209200.

Adding to 1161323147 its reverse (7413231611), we get a palindrome (8574554758).

The spelling of 1161323147 in words is "one billion, one hundred sixty-one million, three hundred twenty-three thousand, one hundred forty-seven".