940409 has 4 divisors (see below), whose sum is σ = 944016. Its totient is φ = 936804.

The previous prime is 940403. The next prime is 940421. The reversal of 940409 is 904049.

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 940409 - 2¹⁶ = 874873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (940403) 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, 1379 + ... + 1944.

It is an arithmetic number, because the mean of its divisors is an integer number (236004).

2⁹⁴⁰⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

940409 is a deficient number, since it is larger than the sum of its proper divisors (3607).

940409 is a wasteful number, since it uses less digits than its factorization.

940409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 940409 is about 969.7468741893. The cubic root of 940409 is about 97.9728162838.

It can be divided in two parts, 94040 and 9, that added together give a palindrome (94049).

The spelling of 940409 in words is "nine hundred forty thousand, four hundred nine".