549806453 has 4 divisors (see below), whose sum is σ = 628350240. Its totient is φ = 471262668.

The previous prime is 549806449. The next prime is 549806479. The reversal of 549806453 is 354608945.

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 a cyclic number.

It is not a de Polignac number, because 549806453 - 2² = 549806449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549806753) 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, 39271883 + ... + 39271896.

It is an arithmetic number, because the mean of its divisors is an integer number (157087560).

Almost surely, 2^549806453 is an apocalyptic number.

It is an amenable number.

549806453 is a deficient number, since it is larger than the sum of its proper divisors (78543787).

549806453 is an equidigital number, since it uses as much as digits as its factorization.

549806453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78543786.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 549806453 is about 23447.9520001215. The cubic root of 549806453 is about 819.2251519468.

The spelling of 549806453 in words is "five hundred forty-nine million, eight hundred six thousand, four hundred fifty-three".