4431913 has 4 divisors (see below), whose sum is σ = 4515588. Its totient is φ = 4348240.

The previous prime is 4431901. The next prime is 4431923. The reversal of 4431913 is 3191344.

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 4012009 + 419904 = 2003^2 + 648^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431913 - 2¹³ = 4423721 is a prime.

It is a Duffinian number.

4431913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4431923) 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, 41758 + ... + 41863.

It is an arithmetic number, because the mean of its divisors is an integer number (1128897).

Almost surely, 2^4431913 is an apocalyptic number.

It is an amenable number.

4431913 is a deficient number, since it is larger than the sum of its proper divisors (83675).

4431913 is an equidigital number, since it uses as much as digits as its factorization.

4431913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83674.

The product of its digits is 1296, while the sum is 25.

The square root of 4431913 is about 2105.2109157992. The cubic root of 4431913 is about 164.2594668302.

The spelling of 4431913 in words is "four million, four hundred thirty-one thousand, nine hundred thirteen".