1205470009 has 2 divisors, whose sum is σ = 1205470010. Its totient is φ = 1205470008.

The previous prime is 1205469971. The next prime is 1205470031. The reversal of 1205470009 is 9000745021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128960000 + 76510009 = 33600^2 + 8747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205470009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205470039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602735004 + 602735005.

It is an arithmetic number, because the mean of its divisors is an integer number (602735005).

Almost surely, 2^1205470009 is an apocalyptic number.

It is an amenable number.

1205470009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205470009 is an equidigital number, since it uses as much as digits as its factorization.

1205470009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1205470009 is about 34719.8791616561. The cubic root of 1205470009 is about 1064.2707753126.

The spelling of 1205470009 in words is "one billion, two hundred five million, four hundred seventy thousand, nine".