1364809 has 2 divisors, whose sum is σ = 1364810. Its totient is φ = 1364808.

The previous prime is 1364791. The next prime is 1364821. The reversal of 1364809 is 9084631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056784 + 308025 = 1028^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1364809 - 2¹¹ = 1362761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1364009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682404 + 682405.

It is an arithmetic number, because the mean of its divisors is an integer number (682405).

2^1364809 is an apocalyptic number.

It is an amenable number.

1364809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1364809 is an equidigital number, since it uses as much as digits as its factorization.

1364809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1364809 is about 1168.2504012411. The cubic root of 1364809 is about 110.9236008111.

The spelling of 1364809 in words is "one million, three hundred sixty-four thousand, eight hundred nine".