4087409 has 4 divisors (see below), whose sum is σ = 4093680. Its totient is φ = 4081140.

The previous prime is 4087403. The next prime is 4087423. The reversal of 4087409 is 9047804.

It is a happy number.

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 4087409 - 2¹⁶ = 4021873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4087403) 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, 2027 + ... + 3504.

It is an arithmetic number, because the mean of its divisors is an integer number (1023420).

Almost surely, 2^4087409 is an apocalyptic number.

It is an amenable number.

4087409 is a deficient number, since it is larger than the sum of its proper divisors (6271).

4087409 is an equidigital number, since it uses as much as digits as its factorization.

4087409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 4087409 is about 2021.7341566091. The cubic root of 4087409 is about 159.8880597227. Note that the first 3 decimals are identical.

The spelling of 4087409 in words is "four million, eighty-seven thousand, four hundred nine".