1173380081 has 2 divisors, whose sum is σ = 1173380082. Its totient is φ = 1173380080.

The previous prime is 1173380063. The next prime is 1173380147. The reversal of 1173380081 is 1800833711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1127885056 + 45495025 = 33584^2 + 6745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1173380081 - 2¹⁸ = 1173117937 is a prime.

It is a super-2 number, since 2×1173380081² = 2753641628975133122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1173388081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586690040 + 586690041.

It is an arithmetic number, because the mean of its divisors is an integer number (586690041).

Almost surely, 2^1173380081 is an apocalyptic number.

It is an amenable number.

1173380081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1173380081 is an equidigital number, since it uses as much as digits as its factorization.

1173380081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1173380081 is about 34254.6359052319. The cubic root of 1173380081 is about 1054.7419930162.

The spelling of 1173380081 in words is "one billion, one hundred seventy-three million, three hundred eighty thousand, eighty-one".