1131234389 has 2 divisors, whose sum is σ = 1131234390. Its totient is φ = 1131234388.

The previous prime is 1131234367. The next prime is 1131234421. The reversal of 1131234389 is 9834321311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1117765489 + 13468900 = 33433^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131234389 - 2¹² = 1131230293 is a prime.

It is a super-3 number, since 3×1131234389³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131234329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565617194 + 565617195.

It is an arithmetic number, because the mean of its divisors is an integer number (565617195).

Almost surely, 2^1131234389 is an apocalyptic number.

It is an amenable number.

1131234389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131234389 is an equidigital number, since it uses as much as digits as its factorization.

1131234389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 1131234389 is about 33633.8280455853. The cubic root of 1131234389 is about 1041.9595663789.

The spelling of 1131234389 in words is "one billion, one hundred thirty-one million, two hundred thirty-four thousand, three hundred eighty-nine".