1230522991 has 2 divisors, whose sum is σ = 1230522992. Its totient is φ = 1230522990.

The previous prime is 1230522911. The next prime is 1230523013. The reversal of 1230522991 is 1992250321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1230522991 - 2⁷ = 1230522863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230522901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615261495 + 615261496.

It is an arithmetic number, because the mean of its divisors is an integer number (615261496).

Almost surely, 2^1230522991 is an apocalyptic number.

1230522991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230522991 is an equidigital number, since it uses as much as digits as its factorization.

1230522991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1230522991 is about 35078.8111400600. The cubic root of 1230522991 is about 1071.5931056636.

The spelling of 1230522991 in words is "one billion, two hundred thirty million, five hundred twenty-two thousand, nine hundred ninety-one".