847491447 has 64 divisors (see below), whose sum is σ = 1356595200. Its totient is φ = 464849280.

The previous prime is 847491427. The next prime is 847491473. The reversal of 847491447 is 744194748.

It is not a de Polignac number, because 847491447 - 2¹¹ = 847489399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 847491396 and 847491405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847491427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2309058 + ... + 2309424.

It is an arithmetic number, because the mean of its divisors is an integer number (21196800).

Almost surely, 2^847491447 is an apocalyptic number.

847491447 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

847491447 is a deficient number, since it is larger than the sum of its proper divisors (509103753).

847491447 is a wasteful number, since it uses less digits than its factorization.

847491447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556.

The product of its digits is 903168, while the sum is 48.

The square root of 847491447 is about 29111.7063567219. The cubic root of 847491447 is about 946.3354473554.

It can be divided in two parts, 847 and 491447, that added together give a palindrome (492294).

The spelling of 847491447 in words is "eight hundred forty-seven million, four hundred ninety-one thousand, four hundred forty-seven".