1161423143 has 2 divisors, whose sum is σ = 1161423144. Its totient is φ = 1161423142.

The previous prime is 1161423097. The next prime is 1161423169. The reversal of 1161423143 is 3413241611.

It is a happy number.

It is an a-pointer prime, because the next prime (1161423169) can be obtained adding 1161423143 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161423143 - 2⁸ = 1161422887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161423443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580711571 + 580711572.

It is an arithmetic number, because the mean of its divisors is an integer number (580711572).

Almost surely, 2^1161423143 is an apocalyptic number.

1161423143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161423143 is an equidigital number, since it uses as much as digits as its factorization.

1161423143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 1161423143 is about 34079.6587864374. The cubic root of 1161423143 is about 1051.1470889432.

Adding to 1161423143 its reverse (3413241611), we get a palindrome (4574664754).

The spelling of 1161423143 in words is "one billion, one hundred sixty-one million, four hundred twenty-three thousand, one hundred forty-three".