4431997 has 6 divisors (see below), whose sum is σ = 4677918. Its totient is φ = 4198392.

The previous prime is 4431991. The next prime is 4432007. The reversal of 4431997 is 7991344.

It can be written as a sum of positive squares in only one way, i.e., 2859481 + 1572516 = 1691^2 + 1254^2 .

It is not a de Polignac number, because 4431997 - 2³ = 4431989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5778 + ... + 6499.

It is an arithmetic number, because the mean of its divisors is an integer number (779653).

Almost surely, 2^4431997 is an apocalyptic number.

It is an amenable number.

4431997 is a deficient number, since it is larger than the sum of its proper divisors (245921).

4431997 is a wasteful number, since it uses less digits than its factorization.

4431997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12315 (or 12296 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 4431997 is about 2105.2308661997. The cubic root of 4431997 is about 164.2605045844.

It can be divided in two parts, 44 and 31997, that added together give a square (32041 = 179²).

The spelling of 4431997 in words is "four million, four hundred thirty-one thousand, nine hundred ninety-seven".