1111136491 has 2 divisors, whose sum is σ = 1111136492. Its totient is φ = 1111136490.

The previous prime is 1111136489. The next prime is 1111136513. The reversal of 1111136491 is 1946311111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111136491 - 2¹ = 1111136489 is a prime.

Together with 1111136489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1111136461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555568245 + 555568246.

It is an arithmetic number, because the mean of its divisors is an integer number (555568246).

Almost surely, 2^1111136491 is an apocalyptic number.

1111136491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111136491 is an equidigital number, since it uses as much as digits as its factorization.

1111136491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 1111136491 is about 33333.7140294927. The cubic root of 1111136491 is about 1035.7520547128.

The spelling of 1111136491 in words is "one billion, one hundred eleven million, one hundred thirty-six thousand, four hundred ninety-one".