542398091 has 2 divisors, whose sum is σ = 542398092. Its totient is φ = 542398090.

The previous prime is 542398081. The next prime is 542398093. The reversal of 542398091 is 190893245.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542398091 - 2⁶ = 542398027 is a prime.

Together with 542398093, 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 (542398093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271199045 + 271199046.

It is an arithmetic number, because the mean of its divisors is an integer number (271199046).

Almost surely, 2^542398091 is an apocalyptic number.

542398091 is a deficient number, since it is larger than the sum of its proper divisors (1).

542398091 is an equidigital number, since it uses as much as digits as its factorization.

542398091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 542398091 is about 23289.4416206143. The cubic root of 542398091 is about 815.5289531719.

The spelling of 542398091 in words is "five hundred forty-two million, three hundred ninety-eight thousand, ninety-one".