1353020209 has 2 divisors, whose sum is σ = 1353020210. Its totient is φ = 1353020208.

The previous prime is 1353020197. The next prime is 1353020353. The reversal of 1353020209 is 9020203531.

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., 1346669809 + 6350400 = 36697^2 + 2520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1353020209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1353620209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676510104 + 676510105.

It is an arithmetic number, because the mean of its divisors is an integer number (676510105).

Almost surely, 2^1353020209 is an apocalyptic number.

It is an amenable number.

1353020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353020209 is an equidigital number, since it uses as much as digits as its factorization.

1353020209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1353020209 is about 36783.4230190721. The cubic root of 1353020209 is about 1106.0330242573.

The spelling of 1353020209 in words is "one billion, three hundred fifty-three million, twenty thousand, two hundred nine".