1123131293 has 2 divisors, whose sum is σ = 1123131294. Its totient is φ = 1123131292.

The previous prime is 1123131277. The next prime is 1123131311. The reversal of 1123131293 is 3921313211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121781049 + 1350244 = 33493^2 + 1162^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123131293 - 2⁴ = 1123131277 is a prime.

It is a super-2 number, since 2×1123131293² = 2522847802631703698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123131203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561565646 + 561565647.

It is an arithmetic number, because the mean of its divisors is an integer number (561565647).

Almost surely, 2^1123131293 is an apocalyptic number.

It is an amenable number.

1123131293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123131293 is an equidigital number, since it uses as much as digits as its factorization.

1123131293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 26.

The square root of 1123131293 is about 33513.1510455224. The cubic root of 1123131293 is about 1039.4657305744.

It can be divided in two parts, 11231 and 31293, that added together give a palindrome (42524).

The spelling of 1123131293 in words is "one billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred ninety-three".