542394439 has 2 divisors, whose sum is σ = 542394440. Its totient is φ = 542394438.

The previous prime is 542394427. The next prime is 542394467. The reversal of 542394439 is 934493245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542394439 - 2⁵ = 542394407 is a prime.

It is equal to p_28467385 and since 542394439 and 28467385 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 542394395 and 542394404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542394499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271197219 + 271197220.

It is an arithmetic number, because the mean of its divisors is an integer number (271197220).

Almost surely, 2^542394439 is an apocalyptic number.

542394439 is a deficient number, since it is larger than the sum of its proper divisors (1).

542394439 is an equidigital number, since it uses as much as digits as its factorization.

542394439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 43.

The square root of 542394439 is about 23289.3632158546. The cubic root of 542394439 is about 815.5271228321.

The spelling of 542394439 in words is "five hundred forty-two million, three hundred ninety-four thousand, four hundred thirty-nine".