1323409 has 2 divisors, whose sum is σ = 1323410. Its totient is φ = 1323408.

The previous prime is 1323389. The next prime is 1323431. The reversal of 1323409 is 9043231.

It is an a-pointer prime, because the next prime (1323431) can be obtained adding 1323409 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 199809 = 1060^2 + 447^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323409 - 2⁷ = 1323281 is a prime.

It is a super-2 number, since 2×1323409² = 3502822762562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1323409.

It is not a weakly prime, because it can be changed into another prime (1323479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661704 + 661705.

It is an arithmetic number, because the mean of its divisors is an integer number (661705).

2^1323409 is an apocalyptic number.

It is an amenable number.

1323409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323409 is an equidigital number, since it uses as much as digits as its factorization.

1323409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1323409 is about 1150.3951495030. The cubic root of 1323409 is about 109.7904827280.

The spelling of 1323409 in words is "one million, three hundred twenty-three thousand, four hundred nine".