542458309 has 2 divisors, whose sum is σ = 542458310. Its totient is φ = 542458308.

The previous prime is 542458307. The next prime is 542458313. The reversal of 542458309 is 903854245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527850625 + 14607684 = 22975^2 + 3822^2 .

It is a cyclic number.

It is not a de Polignac number, because 542458309 - 2¹ = 542458307 is a prime.

It is a super-2 number, since 2×542458309² = 588522034006278962, which contains 22 as substring.

Together with 542458307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542458307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271229154 + 271229155.

It is an arithmetic number, because the mean of its divisors is an integer number (271229155).

Almost surely, 2^542458309 is an apocalyptic number.

It is an amenable number.

542458309 is a deficient number, since it is larger than the sum of its proper divisors (1).

542458309 is an equidigital number, since it uses as much as digits as its factorization.

542458309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 542458309 is about 23290.7344023326. The cubic root of 542458309 is about 815.5591325463.

The spelling of 542458309 in words is "five hundred forty-two million, four hundred fifty-eight thousand, three hundred nine".