1230031189 has 2 divisors, whose sum is σ = 1230031190. Its totient is φ = 1230031188.

The previous prime is 1230031183. The next prime is 1230031223. The reversal of 1230031189 is 9811300321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962054289 + 267976900 = 31017^2 + 16370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230031189 - 2²³ = 1221642581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230031183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615015594 + 615015595.

It is an arithmetic number, because the mean of its divisors is an integer number (615015595).

Almost surely, 2^1230031189 is an apocalyptic number.

It is an amenable number.

1230031189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230031189 is an equidigital number, since it uses as much as digits as its factorization.

1230031189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1230031189 is about 35071.8004812984. The cubic root of 1230031189 is about 1071.4503257610.

The spelling of 1230031189 in words is "one billion, two hundred thirty million, thirty-one thousand, one hundred eighty-nine".