4216909 has 4 divisors (see below), whose sum is σ = 4264380. Its totient is φ = 4169440.

The previous prime is 4216897. The next prime is 4216931. The reversal of 4216909 is 9096124.

It is a happy number.

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 2402500 + 1814409 = 1550^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 4216909 - 2¹³ = 4208717 is a prime.

It is a Duffinian number.

4216909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4216939) 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, 23602 + ... + 23779.

It is an arithmetic number, because the mean of its divisors is an integer number (1066095).

Almost surely, 2^4216909 is an apocalyptic number.

It is an amenable number.

4216909 is a deficient number, since it is larger than the sum of its proper divisors (47471).

4216909 is an equidigital number, since it uses as much as digits as its factorization.

4216909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47470.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 4216909 is about 2053.5113829731. The cubic root of 4216909 is about 161.5590942481.

The spelling of 4216909 in words is "four million, two hundred sixteen thousand, nine hundred nine".