545709547 has 4 divisors (see below), whose sum is σ = 545756616. Its totient is φ = 545662480.

The previous prime is 545709539. The next prime is 545709551. The reversal of 545709547 is 745907545.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 745907545 = 5 ⋅149181509.

It is a cyclic number.

It is not a de Polignac number, because 545709547 - 2³ = 545709539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545709497 and 545709506.

It is not an unprimeable number, because it can be changed into a prime (545703547) 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, 7488 + ... + 33874.

It is an arithmetic number, because the mean of its divisors is an integer number (136439154).

Almost surely, 2^545709547 is an apocalyptic number.

545709547 is a deficient number, since it is larger than the sum of its proper divisors (47069).

545709547 is a wasteful number, since it uses less digits than its factorization.

545709547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47068.

The product of its (nonzero) digits is 882000, while the sum is 46.

The square root of 545709547 is about 23360.4269438724. The cubic root of 545709547 is about 817.1852464408.

The spelling of 545709547 in words is "five hundred forty-five million, seven hundred nine thousand, five hundred forty-seven".