847490309993 has 4 divisors (see below), whose sum is σ = 851792291460. Its totient is φ = 843188328528.

The previous prime is 847490309977. The next prime is 847490310019. The reversal of 847490309993 is 399903094748.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 401590898944 + 445899411049 = 633712^2 + 667757^2 .

It is a cyclic number.

It is not a de Polignac number, because 847490309993 - 2⁴ = 847490309977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847490309903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150990438 + ... + 2150990831.

It is an arithmetic number, because the mean of its divisors is an integer number (212948072865).

Almost surely, 2^847490309993 is an apocalyptic number.

It is an amenable number.

847490309993 is a deficient number, since it is larger than the sum of its proper divisors (4301981467).

847490309993 is a wasteful number, since it uses less digits than its factorization.

847490309993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301981466.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 847490309993 in words is "eight hundred forty-seven billion, four hundred ninety million, three hundred nine thousand, nine hundred ninety-three".