1941809 has 4 divisors (see below), whose sum is σ = 2004480. Its totient is φ = 1879140.

The previous prime is 1941799. The next prime is 1941827. The reversal of 1941809 is 9081491.

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 1941809 - 2¹² = 1937713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1941839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31289 + ... + 31350.

It is an arithmetic number, because the mean of its divisors is an integer number (501120).

2^1941809 is an apocalyptic number.

It is an amenable number.

1941809 is a deficient number, since it is larger than the sum of its proper divisors (62671).

1941809 is an equidigital number, since it uses as much as digits as its factorization.

1941809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62670.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1941809 is about 1393.4880695578. The cubic root of 1941809 is about 124.7581242709.

The spelling of 1941809 in words is "one million, nine hundred forty-one thousand, eight hundred nine".