1181490533 has 4 divisors (see below), whose sum is σ = 1181567340. Its totient is φ = 1181413728.

The previous prime is 1181490523. The next prime is 1181490571. The reversal of 1181490533 is 3350941811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3350941811 = 7 ⋅478705973.

It can be written as a sum of positive squares in 2 ways, for example, as 26646244 + 1154844289 = 5162^2 + 33983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1181490533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1181490493 and 1181490502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181490523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6488 + ... + 49041.

It is an arithmetic number, because the mean of its divisors is an integer number (295391835).

Almost surely, 2^1181490533 is an apocalyptic number.

It is an amenable number.

1181490533 is a deficient number, since it is larger than the sum of its proper divisors (76807).

1181490533 is an equidigital number, since it uses as much as digits as its factorization.

1181490533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76806.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1181490533 is about 34372.8167743058. The cubic root of 1181490533 is about 1057.1665555394.

The spelling of 1181490533 in words is "one billion, one hundred eighty-one million, four hundred ninety thousand, five hundred thirty-three".