1131968473 has 2 divisors, whose sum is σ = 1131968474. Its totient is φ = 1131968472.

The previous prime is 1131968459. The next prime is 1131968527. The reversal of 1131968473 is 3748691311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 889948224 + 242020249 = 29832^2 + 15557^2 .

It is an emirp because it is prime and its reverse (3748691311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131968473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131962473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565984236 + 565984237.

It is an arithmetic number, because the mean of its divisors is an integer number (565984237).

Almost surely, 2^1131968473 is an apocalyptic number.

It is an amenable number.

1131968473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131968473 is an equidigital number, since it uses as much as digits as its factorization.

1131968473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 1131968473 is about 33644.7391578535. The cubic root of 1131968473 is about 1042.1849014827.

The spelling of 1131968473 in words is "one billion, one hundred thirty-one million, nine hundred sixty-eight thousand, four hundred seventy-three".