842097539 has 2 divisors, whose sum is σ = 842097540. Its totient is φ = 842097538.

The previous prime is 842097523. The next prime is 842097593. The reversal of 842097539 is 935790248.

It is a happy number.

Together with next prime (842097593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842097539 - 2⁴ = 842097523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842097493 and 842097502.

It is not a weakly prime, because it can be changed into another prime (842097239) 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, 421048769 + 421048770.

It is an arithmetic number, because the mean of its divisors is an integer number (421048770).

Almost surely, 2^842097539 is an apocalyptic number.

842097539 is a deficient number, since it is larger than the sum of its proper divisors (1).

842097539 is an equidigital number, since it uses as much as digits as its factorization.

842097539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 842097539 is about 29018.9169163840. The cubic root of 842097539 is about 944.3235041503.

The spelling of 842097539 in words is "eight hundred forty-two million, ninety-seven thousand, five hundred thirty-nine".