847384081 has 2 divisors, whose sum is σ = 847384082. Its totient is φ = 847384080.

The previous prime is 847384067. The next prime is 847384117. The reversal of 847384081 is 180483748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464790481 + 382593600 = 21559^2 + 19560^2 .

It is a cyclic number.

It is not a de Polignac number, because 847384081 - 2⁹ = 847383569 is a prime.

It is a super-2 number, since 2×847384081² = 1436119561464429122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (847384061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423692040 + 423692041.

It is an arithmetic number, because the mean of its divisors is an integer number (423692041).

Almost surely, 2^847384081 is an apocalyptic number.

It is an amenable number.

847384081 is a deficient number, since it is larger than the sum of its proper divisors (1).

847384081 is an equidigital number, since it uses as much as digits as its factorization.

847384081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 847384081 is about 29109.8622635010. The cubic root of 847384081 is about 946.2954829235.

It can be divided in two parts, 8473840 and 81, that added together give a square (8473921 = 2911²).

The spelling of 847384081 in words is "eight hundred forty-seven million, three hundred eighty-four thousand, eighty-one".