840070481 has 2 divisors, whose sum is σ = 840070482. Its totient is φ = 840070480.

The previous prime is 840070471. The next prime is 840070513. The reversal of 840070481 is 184070048.

It is an a-pointer prime, because the next prime (840070513) can be obtained adding 840070481 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676000000 + 164070481 = 26000^2 + 12809^2 .

It is a cyclic number.

It is not a de Polignac number, because 840070481 - 2¹⁴ = 840054097 is a prime.

It is a super-2 number, since 2×840070481² = 1411436826095142722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (840070471) 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, 420035240 + 420035241.

It is an arithmetic number, because the mean of its divisors is an integer number (420035241).

Almost surely, 2^840070481 is an apocalyptic number.

It is an amenable number.

840070481 is a deficient number, since it is larger than the sum of its proper divisors (1).

840070481 is an equidigital number, since it uses as much as digits as its factorization.

840070481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 840070481 is about 28983.9693796416. The cubic root of 840070481 is about 943.5651848324.

The spelling of 840070481 in words is "eight hundred forty million, seventy thousand, four hundred eighty-one".