549859631 has 4 divisors (see below), whose sum is σ = 549939000. Its totient is φ = 549780264.

The previous prime is 549859573. The next prime is 549859649. The reversal of 549859631 is 136958945.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136958945 = 5 ⋅27391789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549859631 is a prime.

It is a super-2 number, since 2×549859631² = 604691227606912322, which contains 22 as substring.

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 549859631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549852631) 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, 28181 + ... + 43518.

It is an arithmetic number, because the mean of its divisors is an integer number (137484750).

Almost surely, 2^549859631 is an apocalyptic number.

549859631 is a deficient number, since it is larger than the sum of its proper divisors (79369).

549859631 is an equidigital number, since it uses as much as digits as its factorization.

549859631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79368.

The product of its digits is 1166400, while the sum is 50.

The square root of 549859631 is about 23449.0859310123. The cubic root of 549859631 is about 819.2515632717.

The spelling of 549859631 in words is "five hundred forty-nine million, eight hundred fifty-nine thousand, six hundred thirty-one".