98991000001 has 4 divisors (see below), whose sum is σ = 100858754772. Its totient is φ = 97123245232.

The previous prime is 98990999999. The next prime is 98991000013. The reversal of 98991000001 is 10000019989.

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 39235686400 + 59755313601 = 198080^2 + 244449^2 .

It is a cyclic number.

It is not a de Polignac number, because 98991000001 - 2¹ = 98990999999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98991000061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933877306 + ... + 933877411.

It is an arithmetic number, because the mean of its divisors is an integer number (25214688693).

Almost surely, 2^98991000001 is an apocalyptic number.

It is an amenable number.

98991000001 is a deficient number, since it is larger than the sum of its proper divisors (1867754771).

98991000001 is a wasteful number, since it uses less digits than its factorization.

98991000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867754770.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 98991000001 in words is "ninety-eight billion, nine hundred ninety-one million, one", and thus it is an aban number.