542777491 has 2 divisors, whose sum is σ = 542777492. Its totient is φ = 542777490.

The previous prime is 542777489. The next prime is 542777507. The reversal of 542777491 is 194777245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542777491 - 2¹ = 542777489 is a prime.

Together with 542777489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (542771491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271388745 + 271388746.

It is an arithmetic number, because the mean of its divisors is an integer number (271388746).

Almost surely, 2^542777491 is an apocalyptic number.

542777491 is a deficient number, since it is larger than the sum of its proper divisors (1).

542777491 is an equidigital number, since it uses as much as digits as its factorization.

542777491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 46.

The square root of 542777491 is about 23297.5855186755. The cubic root of 542777491 is about 815.7190592797.

The spelling of 542777491 in words is "five hundred forty-two million, seven hundred seventy-seven thousand, four hundred ninety-one".