542687777 has 2 divisors, whose sum is σ = 542687778. Its totient is φ = 542687776.

The previous prime is 542687741. The next prime is 542687779. The reversal of 542687777 is 777786245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340365601 + 202322176 = 18449^2 + 14224^2 .

It is a cyclic number.

It is not a de Polignac number, because 542687777 - 2²⁰ = 541639201 is a prime.

Together with 542687779, 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 (542687779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271343888 + 271343889.

It is an arithmetic number, because the mean of its divisors is an integer number (271343889).

Almost surely, 2^542687777 is an apocalyptic number.

It is an amenable number.

542687777 is a deficient number, since it is larger than the sum of its proper divisors (1).

542687777 is an equidigital number, since it uses as much as digits as its factorization.

542687777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4609920, while the sum is 53.

The square root of 542687777 is about 23295.6600464550. The cubic root of 542687777 is about 815.6741142496.

The spelling of 542687777 in words is "five hundred forty-two million, six hundred eighty-seven thousand, seven hundred seventy-seven".