549431 has 2 divisors, whose sum is σ = 549432. Its totient is φ = 549430.

The previous prime is 549421. The next prime is 549443. The reversal of 549431 is 134945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549431 - 2¹⁰ = 548407 is a prime.

It is a super-2 number, since 2×549431² = 603748847522, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₅₂₇₈ and since 549431 and 45278 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549431.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549431.

It is not a weakly prime, because it can be changed into another prime (549421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274715 + 274716.

It is an arithmetic number, because the mean of its divisors is an integer number (274716).

2⁵⁴⁹⁴³¹ is an apocalyptic number.

549431 is a deficient number, since it is larger than the sum of its proper divisors (1).

549431 is an equidigital number, since it uses as much as digits as its factorization.

549431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 549431 is about 741.2361297185. The cubic root of 549431 is about 81.9038631412.

The spelling of 549431 in words is "five hundred forty-nine thousand, four hundred thirty-one".