847489481 has 2 divisors, whose sum is σ = 847489482. Its totient is φ = 847489480.

The previous prime is 847489453. The next prime is 847489483. The reversal of 847489481 is 184984748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534765625 + 312723856 = 23125^2 + 17684^2 .

It is a cyclic number.

It is not a de Polignac number, because 847489481 - 2¹⁰ = 847488457 is a prime.

It is a super-2 number, since 2×847489481² = 1436476840811298722, which contains 22 as substring.

Together with 847489483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (847489483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423744740 + 423744741.

It is an arithmetic number, because the mean of its divisors is an integer number (423744741).

Almost surely, 2^847489481 is an apocalyptic number.

It is an amenable number.

847489481 is a deficient number, since it is larger than the sum of its proper divisors (1).

847489481 is an equidigital number, since it uses as much as digits as its factorization.

847489481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 53.

The square root of 847489481 is about 29111.6725902171. The cubic root of 847489481 is about 946.3347155891.

The spelling of 847489481 in words is "eight hundred forty-seven million, four hundred eighty-nine thousand, four hundred eighty-one".