542649843 has 24 divisors (see below), whose sum is σ = 837306288. Its totient is φ = 337462272.

The previous prime is 542649841. The next prime is 542649847. The reversal of 542649843 is 348946245.

542649843 is a `hidden beast` number, since 542 + 64 + 9 + 8 + 43 = 666.

It is not a de Polignac number, because 542649843 - 2¹ = 542649841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542649841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1596 + ... + 32982.

It is an arithmetic number, because the mean of its divisors is an integer number (34887762).

Almost surely, 2^542649843 is an apocalyptic number.

542649843 is a deficient number, since it is larger than the sum of its proper divisors (294656445).

542649843 is a wasteful number, since it uses less digits than its factorization.

542649843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31523 (or 31520 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 542649843 is about 23294.8458462382. The cubic root of 542649843 is about 815.6551085375.

The spelling of 542649843 in words is "five hundred forty-two million, six hundred forty-nine thousand, eight hundred forty-three".