1191356133 has 16 divisors (see below), whose sum is σ = 1788782592. Its totient is φ = 698742000.

The previous prime is 1191356129. The next prime is 1191356149. The reversal of 1191356133 is 3316531911.

It is not a de Polignac number, because 1191356133 - 2² = 1191356129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1191356094 and 1191356103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191356113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581263 + ... + 583308.

It is an arithmetic number, because the mean of its divisors is an integer number (111798912).

Almost surely, 2^1191356133 is an apocalyptic number.

It is an amenable number.

1191356133 is a deficient number, since it is larger than the sum of its proper divisors (597426459).

1191356133 is a wasteful number, since it uses less digits than its factorization.

1191356133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164616.

The product of its digits is 7290, while the sum is 33.

The square root of 1191356133 is about 34516.0271902779. The cubic root of 1191356133 is about 1060.1008961156.

The spelling of 1191356133 in words is "one billion, one hundred ninety-one million, three hundred fifty-six thousand, one hundred thirty-three".