542378069 has 2 divisors, whose sum is σ = 542378070. Its totient is φ = 542378068.

The previous prime is 542378041. The next prime is 542378087. The reversal of 542378069 is 960873245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529690225 + 12687844 = 23015^2 + 3562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542378069 is a prime.

It is a super-2 number, since 2×542378069² = 588347939464337522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542308069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271189034 + 271189035.

It is an arithmetic number, because the mean of its divisors is an integer number (271189035).

Almost surely, 2^542378069 is an apocalyptic number.

It is an amenable number.

542378069 is a deficient number, since it is larger than the sum of its proper divisors (1).

542378069 is an equidigital number, since it uses as much as digits as its factorization.

542378069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 542378069 is about 23289.0117652081. The cubic root of 542378069 is about 815.5189182782.

The spelling of 542378069 in words is "five hundred forty-two million, three hundred seventy-eight thousand, sixty-nine".