4891409 has 4 divisors (see below), whose sum is σ = 4928880. Its totient is φ = 4853940.

The previous prime is 4891399. The next prime is 4891429. The reversal of 4891409 is 9041984.

4891409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4891409 - 2⁸ = 4891153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4891429) 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, 18539 + ... + 18800.

It is an arithmetic number, because the mean of its divisors is an integer number (1232220).

Almost surely, 2^4891409 is an apocalyptic number.

It is an amenable number.

4891409 is a deficient number, since it is larger than the sum of its proper divisors (37471).

4891409 is a wasteful number, since it uses less digits than its factorization.

4891409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37470.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 4891409 is about 2211.6530017161. The cubic root of 4891409 is about 169.7506031619.

The spelling of 4891409 in words is "four million, eight hundred ninety-one thousand, four hundred nine".