847149673 has 2 divisors, whose sum is σ = 847149674. Its totient is φ = 847149672.

The previous prime is 847149643. The next prime is 847149683. The reversal of 847149673 is 376941748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543449344 + 303700329 = 23312^2 + 17427^2 .

It is a cyclic number.

It is not a de Polignac number, because 847149673 - 2²¹ = 845052521 is a prime.

It is not a weakly prime, because it can be changed into another prime (847149613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423574836 + 423574837.

It is an arithmetic number, because the mean of its divisors is an integer number (423574837).

Almost surely, 2^847149673 is an apocalyptic number.

It is an amenable number.

847149673 is a deficient number, since it is larger than the sum of its proper divisors (1).

847149673 is an equidigital number, since it uses as much as digits as its factorization.

847149673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 847149673 is about 29105.8357206935. The cubic root of 847149673 is about 946.2082184063.

The spelling of 847149673 in words is "eight hundred forty-seven million, one hundred forty-nine thousand, six hundred seventy-three".