840075601 has 2 divisors, whose sum is σ = 840075602. Its totient is φ = 840075600.

The previous prime is 840075569. The next prime is 840075623. The reversal of 840075601 is 106570048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520524225 + 319551376 = 22815^2 + 17876^2 .

It is a cyclic number.

It is not a de Polignac number, because 840075601 - 2⁵ = 840075569 is a prime.

It is a super-2 number, since 2×840075601² = 1411454030791022402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (840075641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420037800 + 420037801.

It is an arithmetic number, because the mean of its divisors is an integer number (420037801).

Almost surely, 2^840075601 is an apocalyptic number.

It is an amenable number.

840075601 is a deficient number, since it is larger than the sum of its proper divisors (1).

840075601 is an equidigital number, since it uses as much as digits as its factorization.

840075601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 840075601 is about 28984.0577041932. The cubic root of 840075601 is about 943.5671017524.

The spelling of 840075601 in words is "eight hundred forty million, seventy-five thousand, six hundred one".