1113822491 has 2 divisors, whose sum is σ = 1113822492. Its totient is φ = 1113822490.

The previous prime is 1113822487. The next prime is 1113822509. The reversal of 1113822491 is 1942283111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1942283111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113822491 - 2² = 1113822487 is a prime.

It is not a weakly prime, because it can be changed into another prime (1113822431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556911245 + 556911246.

It is an arithmetic number, because the mean of its divisors is an integer number (556911246).

Almost surely, 2^1113822491 is an apocalyptic number.

1113822491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113822491 is an equidigital number, since it uses as much as digits as its factorization.

1113822491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 1113822491 is about 33373.9792503082. The cubic root of 1113822491 is about 1036.5859730594.

The spelling of 1113822491 in words is "one billion, one hundred thirteen million, eight hundred twenty-two thousand, four hundred ninety-one".