1230203291 has 2 divisors, whose sum is σ = 1230203292. Its totient is φ = 1230203290.

The previous prime is 1230203209. The next prime is 1230203309. The reversal of 1230203291 is 1923020321.

It is a strong prime.

It is an emirp because it is prime and its reverse (1923020321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1230203291 - 2¹⁸ = 1229941147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230203201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615101645 + 615101646.

It is an arithmetic number, because the mean of its divisors is an integer number (615101646).

Almost surely, 2^1230203291 is an apocalyptic number.

1230203291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230203291 is an equidigital number, since it uses as much as digits as its factorization.

1230203291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1230203291 is about 35074.2539621301. The cubic root of 1230203291 is about 1071.5002947228.

The spelling of 1230203291 in words is "one billion, two hundred thirty million, two hundred three thousand, two hundred ninety-one".