1131244999 has 2 divisors, whose sum is σ = 1131245000. Its totient is φ = 1131244998.

The previous prime is 1131244997. The next prime is 1131245033. The reversal of 1131244999 is 9994421311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131244999 - 2¹ = 1131244997 is a prime.

Together with 1131244997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131244997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565622499 + 565622500.

It is an arithmetic number, because the mean of its divisors is an integer number (565622500).

Almost surely, 2^1131244999 is an apocalyptic number.

1131244999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131244999 is an equidigital number, since it uses as much as digits as its factorization.

1131244999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 1131244999 is about 33633.9857733216. The cubic root of 1131244999 is about 1041.9628239285.

The spelling of 1131244999 in words is "one billion, one hundred thirty-one million, two hundred forty-four thousand, nine hundred ninety-nine".