991301000847 has 8 divisors (see below), whose sum is σ = 1325063975856. Its totient is φ = 659202679872.

The previous prime is 991301000779. The next prime is 991301000849. The reversal of 991301000847 is 748000103199.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 991301000847 - 2²⁷ = 991166783119 is a prime.

It is a super-3 number, since 3×991301000847³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 991301000799 and 991301000808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991301000849) 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 7 ways as a sum of consecutive naturals, for example, 416162118 + ... + 416164499.

It is an arithmetic number, because the mean of its divisors is an integer number (165632996982).

Almost surely, 2^991301000847 is an apocalyptic number.

991301000847 is a deficient number, since it is larger than the sum of its proper divisors (333762975009).

991301000847 is a wasteful number, since it uses less digits than its factorization.

991301000847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832327017.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 991301000847 in words is "nine hundred ninety-one billion, three hundred one million, eight hundred forty-seven", and thus it is an aban number.