1165144423 has 2 divisors, whose sum is σ = 1165144424. Its totient is φ = 1165144422.

The previous prime is 1165144399. The next prime is 1165144433. The reversal of 1165144423 is 3244415611.

It is a strong prime.

It is an emirp because it is prime and its reverse (3244415611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165144423 - 2²¹ = 1163047271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165144433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582572211 + 582572212.

It is an arithmetic number, because the mean of its divisors is an integer number (582572212).

Almost surely, 2^1165144423 is an apocalyptic number.

1165144423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165144423 is an equidigital number, since it uses as much as digits as its factorization.

1165144423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 1165144423 is about 34134.2119141485. The cubic root of 1165144423 is about 1052.2685413587.

The spelling of 1165144423 in words is "one billion, one hundred sixty-five million, one hundred forty-four thousand, four hundred twenty-three".