1131087449 has 2 divisors, whose sum is σ = 1131087450. Its totient is φ = 1131087448.

The previous prime is 1131087427. The next prime is 1131087457. The reversal of 1131087449 is 9447801311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971444224 + 159643225 = 31168^2 + 12635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131087449 - 2²⁰ = 1130038873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131087479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565543724 + 565543725.

It is an arithmetic number, because the mean of its divisors is an integer number (565543725).

Almost surely, 2^1131087449 is an apocalyptic number.

It is an amenable number.

1131087449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131087449 is an equidigital number, since it uses as much as digits as its factorization.

1131087449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1131087449 is about 33631.6435667364. The cubic root of 1131087449 is about 1041.9144498319.

The spelling of 1131087449 in words is "one billion, one hundred thirty-one million, eighty-seven thousand, four hundred forty-nine".