847829131609 has 2 divisors, whose sum is σ = 847829131610. Its totient is φ = 847829131608.

The previous prime is 847829131543. The next prime is 847829131619. The reversal of 847829131609 is 906131928748.

847829131609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812954689600 + 34874442009 = 901640^2 + 186747^2 .

It is a cyclic number.

It is not a de Polignac number, because 847829131609 - 2³⁹ = 298073317721 is a prime.

It is not a weakly prime, because it can be changed into another prime (847829131619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423914565804 + 423914565805.

It is an arithmetic number, because the mean of its divisors is an integer number (423914565805).

Almost surely, 2^847829131609 is an apocalyptic number.

It is an amenable number.

847829131609 is a deficient number, since it is larger than the sum of its proper divisors (1).

847829131609 is an equidigital number, since it uses as much as digits as its factorization.

847829131609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 847829131609 in words is "eight hundred forty-seven billion, eight hundred twenty-nine million, one hundred thirty-one thousand, six hundred nine".