4491687 has 4 divisors (see below), whose sum is σ = 5988920. Its totient is φ = 2994456.

The previous prime is 4491679. The next prime is 4491701. The reversal of 4491687 is 7861944.

It is a happy number.

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

It is not a de Polignac number, because 4491687 - 2³ = 4491679 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491667) 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, 748612 + ... + 748617.

It is an arithmetic number, because the mean of its divisors is an integer number (1497230).

Almost surely, 2^4491687 is an apocalyptic number.

4491687 is a deficient number, since it is larger than the sum of its proper divisors (1497233).

4491687 is a wasteful number, since it uses less digits than its factorization.

4491687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497232.

The product of its digits is 48384, while the sum is 39.

The square root of 4491687 is about 2119.3600449192. The cubic root of 4491687 is about 164.9946371076.

The spelling of 4491687 in words is "four million, four hundred ninety-one thousand, six hundred eighty-seven".