547643449 has 4 divisors (see below), whose sum is σ = 549112036. Its totient is φ = 546174864.

The previous prime is 547643417. The next prime is 547643477. The reversal of 547643449 is 944346745.

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 422919225 + 124724224 = 20565^2 + 11168^2 .

It is a cyclic number.

It is not a de Polignac number, because 547643449 - 2⁵ = 547643417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 547643399 and 547643408.

It is not an unprimeable number, because it can be changed into a prime (547643149) 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, 733734 + ... + 734479.

It is an arithmetic number, because the mean of its divisors is an integer number (137278009).

Almost surely, 2^547643449 is an apocalyptic number.

It is an amenable number.

547643449 is a deficient number, since it is larger than the sum of its proper divisors (1468587).

547643449 is a wasteful number, since it uses less digits than its factorization.

547643449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468586.

The product of its digits is 1451520, while the sum is 46.

The square root of 547643449 is about 23401.7830303590. The cubic root of 547643449 is about 818.1494303001.

The spelling of 547643449 in words is "five hundred forty-seven million, six hundred forty-three thousand, four hundred forty-nine".