4009427 has 4 divisors (see below), whose sum is σ = 4019640. Its totient is φ = 3999216.

The previous prime is 4009417. The next prime is 4009451. The reversal of 4009427 is 7249004.

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

It is a cyclic number.

It is not a de Polignac number, because 4009427 - 2¹⁴ = 3993043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4009396 and 4009405.

It is not an unprimeable number, because it can be changed into a prime (4009417) 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, 4493 + ... + 5310.

It is an arithmetic number, because the mean of its divisors is an integer number (1004910).

Almost surely, 2^4009427 is an apocalyptic number.

4009427 is a deficient number, since it is larger than the sum of its proper divisors (10213).

4009427 is an equidigital number, since it uses as much as digits as its factorization.

4009427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10212.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 4009427 is about 2002.3553630662. The cubic root of 4009427 is about 158.8647109408.

The spelling of 4009427 in words is "four million, nine thousand, four hundred twenty-seven".