3504409 has 4 divisors (see below), whose sum is σ = 3509604. Its totient is φ = 3499216.

The previous prime is 3504407. The next prime is 3504419. The reversal of 3504409 is 9044053.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1690000 + 1814409 = 1300^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 3504409 - 2¹ = 3504407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3504407) 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, 1402 + ... + 2995.

It is an arithmetic number, because the mean of its divisors is an integer number (877401).

Almost surely, 2^3504409 is an apocalyptic number.

It is an amenable number.

3504409 is a deficient number, since it is larger than the sum of its proper divisors (5195).

3504409 is an equidigital number, since it uses as much as digits as its factorization.

3504409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3504409 is about 1872.0066773385. The cubic root of 3504409 is about 151.8931757504.

Subtracting from 3504409 its sum of digits (25), we obtain a square (3504384 = 1872²).

The spelling of 3504409 in words is "three million, five hundred four thousand, four hundred nine".