542791891 has 2 divisors, whose sum is σ = 542791892. Its totient is φ = 542791890.

The previous prime is 542791883. The next prime is 542791897. The reversal of 542791891 is 198197245.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542791891 - 2³ = 542791883 is a prime.

It is not a weakly prime, because it can be changed into another prime (542791897) 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, 271395945 + 271395946.

It is an arithmetic number, because the mean of its divisors is an integer number (271395946).

Almost surely, 2^542791891 is an apocalyptic number.

542791891 is a deficient number, since it is larger than the sum of its proper divisors (1).

542791891 is an equidigital number, since it uses as much as digits as its factorization.

542791891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 542791891 is about 23297.8945615264. The cubic root of 542791891 is about 815.7262729481.

The spelling of 542791891 in words is "five hundred forty-two million, seven hundred ninety-one thousand, eight hundred ninety-one".