4491731 has 4 divisors (see below), whose sum is σ = 4498464. Its totient is φ = 4485000.

The previous prime is 4491719. The next prime is 4491749. The reversal of 4491731 is 1371944.

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 4491731 - 2⁶ = 4491667 is a prime.

It is a super-2 number, since 2×4491731² = 40351294752722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4491694 and 4491703.

It is not an unprimeable number, because it can be changed into a prime (4491701) 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, 2240 + ... + 3741.

It is an arithmetic number, because the mean of its divisors is an integer number (1124616).

Almost surely, 2^4491731 is an apocalyptic number.

4491731 is a deficient number, since it is larger than the sum of its proper divisors (6733).

4491731 is an equidigital number, since it uses as much as digits as its factorization.

4491731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732.

The product of its digits is 3024, while the sum is 29.

The square root of 4491731 is about 2119.3704253858. The cubic root of 4491731 is about 164.9951758614.

The spelling of 4491731 in words is "four million, four hundred ninety-one thousand, seven hundred thirty-one".