544549421 has 4 divisors (see below), whose sum is σ = 586437852. Its totient is φ = 502660992.

The previous prime is 544549399. The next prime is 544549427. The reversal of 544549421 is 124945445.

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 155276521 + 389272900 = 12461^2 + 19730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544549421 is a prime.

It is a super-2 number, since 2×544549421² = 593068143822870482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544549427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20944196 + ... + 20944221.

It is an arithmetic number, because the mean of its divisors is an integer number (146609463).

Almost surely, 2^544549421 is an apocalyptic number.

It is an amenable number.

544549421 is a deficient number, since it is larger than the sum of its proper divisors (41888431).

544549421 is a wasteful number, since it uses less digits than its factorization.

544549421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41888430.

The product of its digits is 115200, while the sum is 38.

The square root of 544549421 is about 23335.5827225291. The cubic root of 544549421 is about 816.6057498548.

The spelling of 544549421 in words is "five hundred forty-four million, five hundred forty-nine thousand, four hundred twenty-one".