9980109901 has 4 divisors (see below), whose sum is σ = 9982227712. Its totient is φ = 9977992092.

The previous prime is 9980109859. The next prime is 9980109911. The reversal of 9980109901 is 1099010899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9980109901 - 2⁷ = 9980109773 is a prime.

It is the 99901-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980109911) by changing a digit.

It is a nontrivial repunit in base 99900.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051821 + ... + 1061266.

It is an arithmetic number, because the mean of its divisors is an integer number (2495556928).

Almost surely, 2^9980109901 is an apocalyptic number.

It is an amenable number.

9980109901 is a deficient number, since it is larger than the sum of its proper divisors (2117811).

9980109901 is a wasteful number, since it uses less digits than its factorization.

9980109901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117810.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 9980109901 is about 99900.5000037537. The cubic root of 9980109901 is about 2153.0053446428.

The spelling of 9980109901 in words is "nine billion, nine hundred eighty million, one hundred nine thousand, nine hundred one".