101989801 has 3 divisors (see below), whose sum is σ = 101999901. Its totient is φ = 101979702.

The previous prime is 101989759. The next prime is 101989829. The reversal of 101989801 is 108989101.

It is a happy number.

The square root of 101989801 is 10099.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 101989801 - 2⁹ = 101989289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101989831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5050 + ... + 15148.

It is an arithmetic number, because the mean of its divisors is an integer number (33999967).

Almost surely, 2^101989801 is an apocalyptic number.

101989801 is the 10099-th square number.

101989801 is the 5050-th centered octagonal number.

It is an amenable number.

101989801 is a deficient number, since it is larger than the sum of its proper divisors (10100).

101989801 is an frugal number, since it uses more digits than its factorization.

101989801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20198 (or 10099 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 37.

The cubic root of 101989801 is about 467.2172994143.

Multiplying 101989801 by its product of nonzero digits (5184), we get a square (528715128384 = 727128²).

The spelling of 101989801 in words is "one hundred one million, nine hundred eighty-nine thousand, eight hundred one".