542549477 has 4 divisors (see below), whose sum is σ = 547921356. Its totient is φ = 537177600.

The previous prime is 542549473. The next prime is 542549479. The reversal of 542549477 is 774945245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774945245 = 5 ⋅154989049.

It can be written as a sum of positive squares in 2 ways, for example, as 532271041 + 10278436 = 23071^2 + 3206^2 .

It is a cyclic number.

It is not a de Polignac number, because 542549477 - 2² = 542549473 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 (542549473) 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, 2685788 + ... + 2685989.

It is an arithmetic number, because the mean of its divisors is an integer number (136980339).

Almost surely, 2^542549477 is an apocalyptic number.

It is an amenable number.

542549477 is a deficient number, since it is larger than the sum of its proper divisors (5371879).

542549477 is a wasteful number, since it uses less digits than its factorization.

542549477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371878.

The product of its digits is 1411200, while the sum is 47.

The square root of 542549477 is about 23292.6914932560. The cubic root of 542549477 is about 815.6048188408.

The spelling of 542549477 in words is "five hundred forty-two million, five hundred forty-nine thousand, four hundred seventy-seven".