1091247133 has 2 divisors, whose sum is σ = 1091247134. Its totient is φ = 1091247132.

The previous prime is 1091247109. The next prime is 1091247139. The reversal of 1091247133 is 3317421901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1084911844 + 6335289 = 32938^2 + 2517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091247133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1091247095 and 1091247104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091247139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545623566 + 545623567.

It is an arithmetic number, because the mean of its divisors is an integer number (545623567).

Almost surely, 2^1091247133 is an apocalyptic number.

It is an amenable number.

1091247133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091247133 is an equidigital number, since it uses as much as digits as its factorization.

1091247133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1091247133 is about 33034.0299237014. The cubic root of 1091247133 is about 1029.5348177464.

The spelling of 1091247133 in words is "one billion, ninety-one million, two hundred forty-seven thousand, one hundred thirty-three".