1161501323 has 2 divisors, whose sum is σ = 1161501324. Its totient is φ = 1161501322.

The previous prime is 1161501287. The next prime is 1161501379. The reversal of 1161501323 is 3231051611.

It is a weak prime.

It is an emirp because it is prime and its reverse (3231051611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161501323 - 2¹⁶ = 1161435787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161501023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580750661 + 580750662.

It is an arithmetic number, because the mean of its divisors is an integer number (580750662).

Almost surely, 2^1161501323 is an apocalyptic number.

1161501323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161501323 is an equidigital number, since it uses as much as digits as its factorization.

1161501323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1161501323 is about 34080.8057856618. The cubic root of 1161501323 is about 1051.1706740411.

Adding to 1161501323 its reverse (3231051611), we get a palindrome (4392552934).

The spelling of 1161501323 in words is "one billion, one hundred sixty-one million, five hundred one thousand, three hundred twenty-three".