1303409 has 2 divisors, whose sum is σ = 1303410. Its totient is φ = 1303408.

The previous prime is 1303363. The next prime is 1303411. The reversal of 1303409 is 9043031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 442225 = 928^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303409 - 2²⁰ = 254833 is a prime.

Together with 1303411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1303439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651704 + 651705.

It is an arithmetic number, because the mean of its divisors is an integer number (651705).

2^1303409 is an apocalyptic number.

It is an amenable number.

1303409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303409 is an equidigital number, since it uses as much as digits as its factorization.

1303409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1303409 is about 1141.6693917242. The cubic root of 1303409 is about 109.2346039707.

The spelling of 1303409 in words is "one million, three hundred three thousand, four hundred nine".