1131442399 has 2 divisors, whose sum is σ = 1131442400. Its totient is φ = 1131442398.

The previous prime is 1131442373. The next prime is 1131442441. The reversal of 1131442399 is 9932441311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131442399 - 2¹¹ = 1131440351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131442339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565721199 + 565721200.

It is an arithmetic number, because the mean of its divisors is an integer number (565721200).

Almost surely, 2^1131442399 is an apocalyptic number.

1131442399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131442399 is an equidigital number, since it uses as much as digits as its factorization.

1131442399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 1131442399 is about 33636.9201770911. The cubic root of 1131442399 is about 1042.0234272163.

The spelling of 1131442399 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, three hundred ninety-nine".