1303201609 has 2 divisors, whose sum is σ = 1303201610. Its totient is φ = 1303201608.

The previous prime is 1303201607. The next prime is 1303201619. The reversal of 1303201609 is 9061023031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871725625 + 431475984 = 29525^2 + 20772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303201609 - 2¹ = 1303201607 is a prime.

Together with 1303201607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1303201607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651600804 + 651600805.

It is an arithmetic number, because the mean of its divisors is an integer number (651600805).

Almost surely, 2^1303201609 is an apocalyptic number.

It is an amenable number.

1303201609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303201609 is an equidigital number, since it uses as much as digits as its factorization.

1303201609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1303201609 is about 36099.8837809764. The cubic root of 1303201609 is about 1092.2881006782.

The spelling of 1303201609 in words is "one billion, three hundred three million, two hundred one thousand, six hundred nine".