542429681 has 2 divisors, whose sum is σ = 542429682. Its totient is φ = 542429680.

The previous prime is 542429653. The next prime is 542429683. The reversal of 542429681 is 186924245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367105600 + 175324081 = 19160^2 + 13241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542429681 is a prime.

It is a super-2 number, since 2×542429681² = 588459917659523522, which contains 22 as substring.

Together with 542429683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542429683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271214840 + 271214841.

It is an arithmetic number, because the mean of its divisors is an integer number (271214841).

Almost surely, 2^542429681 is an apocalyptic number.

It is an amenable number.

542429681 is a deficient number, since it is larger than the sum of its proper divisors (1).

542429681 is an equidigital number, since it uses as much as digits as its factorization.

542429681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 542429681 is about 23290.1198150632. The cubic root of 542429681 is about 815.5447853685.

The spelling of 542429681 in words is "five hundred forty-two million, four hundred twenty-nine thousand, six hundred eighty-one".