842061109 has 2 divisors, whose sum is σ = 842061110. Its totient is φ = 842061108.

The previous prime is 842061067. The next prime is 842061149. The reversal of 842061109 is 901160248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654234084 + 187827025 = 25578^2 + 13705^2 .

It is a cyclic number.

It is not a de Polignac number, because 842061109 - 2¹³ = 842052917 is a prime.

It is a super-2 number, since 2×842061109² = 1418133822580619762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842061149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421030554 + 421030555.

It is an arithmetic number, because the mean of its divisors is an integer number (421030555).

Almost surely, 2^842061109 is an apocalyptic number.

It is an amenable number.

842061109 is a deficient number, since it is larger than the sum of its proper divisors (1).

842061109 is an equidigital number, since it uses as much as digits as its factorization.

842061109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 842061109 is about 29018.2892155964. The cubic root of 842061109 is about 944.3098864873.

The spelling of 842061109 in words is "eight hundred forty-two million, sixty-one thousand, one hundred nine".