1131624289 has 2 divisors, whose sum is σ = 1131624290. Its totient is φ = 1131624288.

The previous prime is 1131624281. The next prime is 1131624293. The reversal of 1131624289 is 9824261311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832611025 + 299013264 = 28855^2 + 17292^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131624289 - 2³ = 1131624281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131624281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565812144 + 565812145.

It is an arithmetic number, because the mean of its divisors is an integer number (565812145).

Almost surely, 2^1131624289 is an apocalyptic number.

It is an amenable number.

1131624289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131624289 is an equidigital number, since it uses as much as digits as its factorization.

1131624289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 1131624289 is about 33639.6237939725. The cubic root of 1131624289 is about 1042.0792625777.

The spelling of 1131624289 in words is "one billion, one hundred thirty-one million, six hundred twenty-four thousand, two hundred eighty-nine".