1135623191 has 2 divisors, whose sum is σ = 1135623192. Its totient is φ = 1135623190.

The previous prime is 1135623131. The next prime is 1135623193. The reversal of 1135623191 is 1913265311.

It is a strong prime.

It is an emirp because it is prime and its reverse (1913265311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1135623191 - 2³⁰ = 61881367 is a prime.

Together with 1135623193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135623193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567811595 + 567811596.

It is an arithmetic number, because the mean of its divisors is an integer number (567811596).

Almost surely, 2^1135623191 is an apocalyptic number.

1135623191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135623191 is an equidigital number, since it uses as much as digits as its factorization.

1135623191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 1135623191 is about 33699.0087539678. The cubic root of 1135623191 is about 1043.3053096233.

The spelling of 1135623191 in words is "one billion, one hundred thirty-five million, six hundred twenty-three thousand, one hundred ninety-one".