4491909 has 32 divisors (see below), whose sum is σ = 7032960. Its totient is φ = 2830464.

The previous prime is 4491899. The next prime is 4491913. The reversal of 4491909 is 9091944.

It is not a de Polignac number, because 4491909 - 2⁸ = 4491653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61497 + ... + 61569.

It is an arithmetic number, because the mean of its divisors is an integer number (219780).

Almost surely, 2^4491909 is an apocalyptic number.

It is an amenable number.

4491909 is a deficient number, since it is larger than the sum of its proper divisors (2541051).

4491909 is a wasteful number, since it uses less digits than its factorization.

4491909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 4491909 is about 2119.4124185727. The cubic root of 4491909 is about 164.9973553295.

The spelling of 4491909 in words is "four million, four hundred ninety-one thousand, nine hundred nine".