1131138473 has 2 divisors, whose sum is σ = 1131138474. Its totient is φ = 1131138472.

The previous prime is 1131138467. The next prime is 1131138499. The reversal of 1131138473 is 3748311311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 818131609 + 313006864 = 28603^2 + 17692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131138473 - 2¹⁶ = 1131072937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131138403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565569236 + 565569237.

It is an arithmetic number, because the mean of its divisors is an integer number (565569237).

Almost surely, 2^1131138473 is an apocalyptic number.

It is an amenable number.

1131138473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131138473 is an equidigital number, since it uses as much as digits as its factorization.

1131138473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 1131138473 is about 33632.4021294941. The cubic root of 1131138473 is about 1041.9301167147.

Adding to 1131138473 its reverse (3748311311), we get a palindrome (4879449784).

The spelling of 1131138473 in words is "one billion, one hundred thirty-one million, one hundred thirty-eight thousand, four hundred seventy-three".