548971391 has 8 divisors (see below), whose sum is σ = 558983568. Its totient is φ = 538992000.

The previous prime is 548971321. The next prime is 548971393. The reversal of 548971391 is 193179845.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 548971391 - 2¹⁸ = 548709247 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 (548971393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26951 + ... + 42711.

It is an arithmetic number, because the mean of its divisors is an integer number (69872946).

Almost surely, 2^548971391 is an apocalyptic number.

548971391 is a deficient number, since it is larger than the sum of its proper divisors (10012177).

548971391 is a wasteful number, since it uses less digits than its factorization.

548971391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16393.

The product of its digits is 272160, while the sum is 47.

The square root of 548971391 is about 23430.1385185833. The cubic root of 548971391 is about 818.8101874757.

The spelling of 548971391 in words is "five hundred forty-eight million, nine hundred seventy-one thousand, three hundred ninety-one".