1963409 has 4 divisors (see below), whose sum is σ = 2243904. Its totient is φ = 1682916.

The previous prime is 1963397. The next prime is 1963411. The reversal of 1963409 is 9043691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1963409 - 2⁸ = 1963153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1963459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140237 + ... + 140250.

It is an arithmetic number, because the mean of its divisors is an integer number (560976).

2^1963409 is an apocalyptic number.

It is an amenable number.

1963409 is a deficient number, since it is larger than the sum of its proper divisors (280495).

1963409 is an equidigital number, since it uses as much as digits as its factorization.

1963409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280494.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1963409 is about 1401.2169710648. The cubic root of 1963409 is about 125.2190080597.

The spelling of 1963409 in words is "one million, nine hundred sixty-three thousand, four hundred nine".