542039389 has 4 divisors (see below), whose sum is σ = 542481660. Its totient is φ = 541597120.

The previous prime is 542039383. The next prime is 542039401. The reversal of 542039389 is 983930245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983930245 = 5 ⋅196786049.

It can be written as a sum of positive squares in 2 ways, for example, as 251064025 + 290975364 = 15845^2 + 17058^2 .

It is a cyclic number.

It is not a de Polignac number, because 542039389 - 2⁹ = 542038877 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 (542039383) 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, 219292 + ... + 221749.

It is an arithmetic number, because the mean of its divisors is an integer number (135620415).

Almost surely, 2^542039389 is an apocalyptic number.

It is an amenable number.

542039389 is a deficient number, since it is larger than the sum of its proper divisors (442271).

542039389 is a wasteful number, since it uses less digits than its factorization.

542039389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442270.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 542039389 is about 23281.7393894872. The cubic root of 542039389 is about 815.3491366734.

The spelling of 542039389 in words is "five hundred forty-two million, thirty-nine thousand, three hundred eighty-nine".