1131131437 has 2 divisors, whose sum is σ = 1131131438. Its totient is φ = 1131131436.

The previous prime is 1131131359. The next prime is 1131131483. The reversal of 1131131437 is 7341311311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839029156 + 292102281 = 28966^2 + 17091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131131437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131131137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565565718 + 565565719.

It is an arithmetic number, because the mean of its divisors is an integer number (565565719).

Almost surely, 2^1131131437 is an apocalyptic number.

It is an amenable number.

1131131437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131131437 is an equidigital number, since it uses as much as digits as its factorization.

1131131437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 1131131437 is about 33632.2975278229. The cubic root of 1131131437 is about 1041.9279563440.

Adding to 1131131437 its reverse (7341311311), we get a palindrome (8472442748).

The spelling of 1131131437 in words is "one billion, one hundred thirty-one million, one hundred thirty-one thousand, four hundred thirty-seven".