1230202009 has 2 divisors, whose sum is σ = 1230202010. Its totient is φ = 1230202008.

The previous prime is 1230202003. The next prime is 1230202031. The reversal of 1230202009 is 9002020321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046328409 + 183873600 = 32347^2 + 13560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230202009 - 2¹⁷ = 1230070937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230202003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615101004 + 615101005.

It is an arithmetic number, because the mean of its divisors is an integer number (615101005).

Almost surely, 2^1230202009 is an apocalyptic number.

It is an amenable number.

1230202009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230202009 is an equidigital number, since it uses as much as digits as its factorization.

1230202009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1230202009 is about 35074.2356866119. The cubic root of 1230202009 is about 1071.4999225177.

The spelling of 1230202009 in words is "one billion, two hundred thirty million, two hundred two thousand, nine".