544431421 has 4 divisors (see below), whose sum is σ = 545731200. Its totient is φ = 543131644.

The previous prime is 544431403. The next prime is 544431439. The reversal of 544431421 is 124134445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (544431403) and next prime (544431439).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544431421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 544431421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544438421) 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, 649261 + ... + 650098.

It is an arithmetic number, because the mean of its divisors is an integer number (136432800).

Almost surely, 2^544431421 is an apocalyptic number.

It is an amenable number.

544431421 is a deficient number, since it is larger than the sum of its proper divisors (1299779).

544431421 is a wasteful number, since it uses less digits than its factorization.

544431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299778.

The product of its digits is 7680, while the sum is 28.

The square root of 544431421 is about 23333.0542578549. The cubic root of 544431421 is about 816.5467613678.

Adding to 544431421 its reverse (124134445), we get a palindrome (668565866).

The spelling of 544431421 in words is "five hundred forty-four million, four hundred thirty-one thousand, four hundred twenty-one".