542338549 has 2 divisors, whose sum is σ = 542338550. Its totient is φ = 542338548.

The previous prime is 542338507. The next prime is 542338567. The reversal of 542338549 is 945833245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536848900 + 5489649 = 23170^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 542338549 - 2⁷ = 542338421 is a prime.

It is a super-2 number, since 2×542338549² = 588262203462850802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542339549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271169274 + 271169275.

It is an arithmetic number, because the mean of its divisors is an integer number (271169275).

Almost surely, 2^542338549 is an apocalyptic number.

It is an amenable number.

542338549 is a deficient number, since it is larger than the sum of its proper divisors (1).

542338549 is an equidigital number, since it uses as much as digits as its factorization.

542338549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

The square root of 542338549 is about 23288.1632809460. The cubic root of 542338549 is about 815.4991103912.

The spelling of 542338549 in words is "five hundred forty-two million, three hundred thirty-eight thousand, five hundred forty-nine".