548972509 has 4 divisors (see below), whose sum is σ = 549321760. Its totient is φ = 548623260.

The previous prime is 548972507. The next prime is 548972513. The reversal of 548972509 is 905279845.

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 548972509 - 2¹ = 548972507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548972503) 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, 172257 + ... + 175414.

It is an arithmetic number, because the mean of its divisors is an integer number (137330440).

Almost surely, 2^548972509 is an apocalyptic number.

It is an amenable number.

548972509 is a deficient number, since it is larger than the sum of its proper divisors (349251).

548972509 is a wasteful number, since it uses less digits than its factorization.

548972509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349250.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 548972509 is about 23430.1623767314. The cubic root of 548972509 is about 818.8107433208.

The spelling of 548972509 in words is "five hundred forty-eight million, nine hundred seventy-two thousand, five hundred nine".