84991647983 has 8 divisors (see below), whose sum is σ = 92724127056. Its totient is φ = 77260163200.

The previous prime is 84991647971. The next prime is 84991647991. The reversal of 84991647983 is 38974619948.

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

It is a de Polignac number, because none of the positive numbers 2^k-84991647983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84991641983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63866 + ... + 417207.

It is an arithmetic number, because the mean of its divisors is an integer number (11590515882).

Almost surely, 2^84991647983 is an apocalyptic number.

84991647983 is a deficient number, since it is larger than the sum of its proper divisors (7732479073).

84991647983 is a wasteful number, since it uses less digits than its factorization.

84991647983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497145.

The product of its digits is 94058496, while the sum is 68.

The spelling of 84991647983 in words is "eighty-four billion, nine hundred ninety-one million, six hundred forty-seven thousand, nine hundred eighty-three".